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U.S. public vehicle records

2004 Yamaha FZ6 problems and owner complaints

Explore the records behind recurring owner reports.

Key facts

34 owner complaints analyzed

0 distinct recall campaigns

6,850 mi median reported failure mileage

Scope: 2004 model year. Data updated: . 30 complaints include usable failure mileage. View data status.

Owner-reported patterns

Most common problems

Fuel System, Gasoline:Fuel Injection System is the most frequently named component, appearing in 9 of 34 complaints (26.5%). A complaint can name multiple components.

Recurring terms in complaint narratives
TopicMatching reportsShare of complaints
Engine operation2573.5%
Transmission and shifting411.8%
Electrical and battery issues12.9%

Topic matches use published keyword rules. They describe mentions, including negations or comparisons, and do not confirm a diagnosis. Read the matching rules.

Component breakdown

Number of unique complaints naming each component. Top eight shown.

Fuel System, Gasoline:Fuel Injection System
9
Vehicle Speed Control
6
Electrical System
5
Fuel System, Gasoline:Delivery
5
Fuel System, Other
3
Engine And Engine Cooling:Engine
2
Fuel System, Other:Delivery
2
Electrical System:Ignition
1
Component breakdown data
CategoryCount
Fuel System, Gasoline:Fuel Injection System9
Vehicle Speed Control6
Electrical System5
Fuel System, Gasoline:Delivery5
Fuel System, Other3
Engine And Engine Cooling:Engine2
Fuel System, Other:Delivery2
Electrical System:Ignition1

Fuel System, Gasoline:Fuel Injection System: 9; Vehicle Speed Control: 6; Electrical System: 5; Fuel System, Gasoline:Delivery: 5; Fuel System, Other: 3; Engine And Engine Cooling:Engine: 2; Fuel System, Other:Delivery: 2; Electrical System:Ignition: 1

Reported problems by failure mileage

Complaint counts in mileage bands. These are not failure rates per vehicle or mile.

Under 25,000
30
25,000 to 49,999
0
50,000 to 74,999
0
75,000 to 99,999
0
100,000 to 149,999
0
150,000 and above
0
Reported problems by failure mileage data
CategoryCount
Under 25,00030
25,000 to 49,9990
50,000 to 74,9990
75,000 to 99,9990
100,000 to 149,9990
150,000 and above0

Under 25,000: 30; 25,000 to 49,999: 0; 50,000 to 74,999: 0; 75,000 to 99,999: 0; 100,000 to 149,999: 0; 150,000 and above: 0

Under 25,000 miles has the most reports with usable mileage (30). 4 complaints have missing, zero or invalid mileage.

Complaints over time

Year the complaint was filed, not the vehicle model year or incident year. The snapshot year is partial.

2005
25
2006
8
2023
1
Complaints over time data
CategoryCount
200525
20068
20231

2005: 25; 2006: 8; 2023: 1

Pattern summary

Fuel System, Gasoline:Fuel Injection System leads the component reports. Engine operation appears in 25 complaint narratives. Transmission and shifting appears in 4 complaint narratives. Electrical and battery issues appears in 1 complaint narratives. Use these patterns to inspect individual reports and prepare questions for a mechanic.

Calculated from recorded counts. An AI narrative has not been published for this selection.

Complaint evidence

Examples provide context, not a representative sample or a verified diagnosis.

Owner report 10118064 · 2005-04-18 (April 18, 2005)

1-AVERAGE USAGE, 2-MOTORCYCLES WOULD STALL SPORADICALLY, RPMS WOULD VARY CONSIDERABLY, A LOT OF HESITATION, VARIABLE IDLING, BAD GAS CONSUMPTION. A FAILURE OF THE MOTORCYCLE TO CEASE THROTTLE OPERATIONS THROUGH MID-CORNER DURING A TURN WOULD INEVITABLY CAUSE THE MOTORCYCLE AND ITS RIDER TO LOSE TRACTION AT THE REAR WHEELS. FURTHER CONSEQUENCES WOULD BE DEATH TO THE RIDER IN EXTREME, BUT HIGHLY LIKELY CIRCUMSTANCES. 3-THERE WAS A DEFECTIVE THROTTLE POSITIONING SENSOR WITH THE 2004-2005 YAMAHA FZ6 MOTORCYCLES. YAMAHA HAS SO FAR FAILED TO AN…

Owner-reported narrative. 8,700 miles reported. Look up ODI 10118064 at NHTSA ↗

Owner report 10118434 · 2005-04-25 (April 25, 2005)

IDLE SUDDENLY GETS ROUGH THEN ENGINE QUITS/STALLS AT RANDOM TIMES, MOST OFTEN AT LOW SPEED AFTER DOWNSHIFTING, BUT HAS HAPPENED AT HIGHWAY SPEEDS ON PARKWAY IN TRAFFIC. I'M INVOLVED WITH AN ONLINE USERS GROUP OF FZ6 OWNERS (ABOUT 100-150 IN THE GROUP) AND ABOUT 20 - 25 PEOPLE HAVE HAD TO GET THE THROTTLE POSITION SENSOR (TPS) REPLACED TO CORRECT THE PROBLEM. (WITHIN THE 1ST YEAR OF OWNERSHIP) I BELIEVE MY BIKE IS STARTING TO EXHIBIT SOME OF THE SAME CHARACTERISTICS THEY ALL HAD AND FEEL YAMAHA SHOULD LOOK INTO THIS FOR A RECALL BEFORE SO…

Owner-reported narrative. 2,000 miles reported. Look up ODI 10118434 at NHTSA ↗

Owner report 10120825 · 2005-05-13 (May 13, 2005)

2004 YAMAHA FZ6 13K+ MILES. DURING A SUSTAINED CRUISE, WITH A SUSTAINED RPM BETWEEN 4K AND 5K RPM, THE ENGINE BEGAN FALTERING/BOGGING DOWN AND RUNNING VERY ROUGH. ACCOMPANYING THIS ISSUE, THERE IS A MARKED SENSE OF DECELERATION UNLESS MORE THROTTLE IS APPLIED TO COMPENSATE FOR THE THE LOSS OF POWER; THE DECELERATION, AT TIMES, CAN BE QUITE SUDDEN. THIS PROBLEM TENDS TO OCCUR BEYOND 1/2 HOUR OF OPERATION. IF DOWNSHIFTING OR UPSHIFTING IS PERFORMED DURING THE ENGINE FALTERING, THE RESULT IS A STALLED OUT ENGINE UNLESS SHIFTING IS PERFORMED VERY Q…

Owner-reported narrative. 13,799 miles reported. Look up ODI 10120825 at NHTSA ↗

Owner report 10121061 · 2005-05-16 (May 16, 2005)

2004 YAMAHA FZ6 5K+ MILES. WHEN CRUISING AND KEEPING THE ACCELERATOR CONSTANT, ONE EXPERIENCES SUDDEN CHANGES IN ENGINE-TO-TRANSMISSION POWER FEED: THE BIKE SUDDENLY STARTS TO ACCELERATE OR SLOW DOWN. ONE MUST COMPENSATE CONSTATNLY FOR THAT ERRATIC ENGINE BEHAVIOR, WHICH TAKES AWAY FROM PAYING ATTENTION TO THE ROAD. IF DOWNSHIFTING, UPSHIFTING OR CLUTCH DISENGAGEMENT IS PERFORMED DURING THE ENGINE FALTERING, THE RESULT IS A STALLED OUT ENGINE UNLESS SHIFTING IS PERFORMED VERY QUICKLY. STALLING OUT WHILE DOWNSHIFTING FOR A FULL STOP AT AN …

Owner-reported narrative. 5,000 miles reported. Look up ODI 10121061 at NHTSA ↗

Owner report 10157688 · 2006-05-16 (May 16, 2006)

AT 9M MILES, MY 2004 YAMAHA FZ6 BEGAN TO EXHIBIT THE FOLLOWING: 1) AFTER APPROXIMATELY 30 MINUTES OF OPERATION, ERRATIC AND PROLONGED PERIODS OF ROUGH IDLE AT 500 RPMS INSTEAD OF THE NORMAL 1300 RPMS 2) MOTOR WOULD STALL DURING GEAR CHANGES, EVEN AT HIGHWAY SPEEDS 3) DURING THESE TIMES, THE SMELL OF GASOLINE WAS NOTICEABLE. CHANGING THE SPARK PLUGS SEEMED TO FIX THE PROBLEM TEMPORARILY, BUT THEY SOON REAPPEARED. AT 12M MILES, THE BIKE WAS TAKEN TO THE YAMAHA DEALER TO BE FIXED BUT THEY COULD FIND NOTHING WRONG WITH IT. I WENT NEXT TO AN …

Owner-reported narrative. 12,800 miles reported. Look up ODI 10157688 at NHTSA ↗

Explore the data

Vehicle analysis explorer

Inspect model-year patterns, reported mileage, monthly activity and the evidence behind each signal.

Data completeness

34 unique complaints in this selection. Analysis snapshot: 2026-10-01.

88.2%Usable mileage30 / 34 records
100.0%Valid incident date34 / 34 records
100.0%Valid filing date34 / 34 records
100.0%Ordered incident and filing dates34 / 34 records

Missing, zero and invalid mileage is excluded. Dates after the snapshot are excluded. Examples are limited selections, not a representative sample.

Problems by model year

Model-wide comparison of the eight most reported components across the model. Cells show counts and shares within each model year. Open a cell for source examples.

Component complaint heatmap
Component200420052006
Fuel System, Gasoline:Fuel Injection System
926.5%
ODI 10118576 · 8,000 mi

1) AT APPROXIMATELY 8000 MILES ON THE ODOMETER, MY YAMAHA FZ6 BEGAN EXHIBITING PERIODIC STALLING. WHEN UNDER NORMAL POWER, THE BIKE EXHIBITED A MODERATE LOSS OF POWER, WITH A COMPLETE ENGINE STALL ONCE THE CLUTCH WAS DISENGAGED (WHILE STOPPING IN TRAFFIC OR PARKING). THESE SYMPTOMS INCREASED IN FREQUENCY UNTIL IT WAS HAPPENING SEVERAL TIMES PER DAY. 2) THE CONSEQUENCES OF THE FAILURE WERE GENERALLY MINIMAL, WITH THE EXCEPTION OF STALLING IN STOP-AND-GO TRAFFIC. ON MORE THAN ONE OCCASION, THE STALLING PREVENTED ME FROM MOVING WHEN TRAFFIC …

Look up ODI 10118576 at NHTSA ↗

17.1%
ODI 10139422 · 7,600 mi

ROUGH RUNNING AT SMALL THROTTLE OPENINGS, STALLING. NOT CORRECTED YET. *JB

Look up ODI 10139422 at NHTSA ↗

00.0%

No examples available for this selection.

Vehicle Speed Control
617.6%
ODI 10118730 · 4,400 mi

1. BIKE WAS BADLY HESITATING STARTING OFF IN 1ST GEAR FROM A STOP. 2. TURNING THE THROTTLE TO ACCELERATE WOULD SOMETIMES PITCH ME FORWARD ON THE START AS THE ENGINE HESITATED, THEN TURNING IT A BIT MORE WOULD ALMOST THROW ME OFF AS IT ACCELERATED. 3. ONE DEALERSHIP TRIED ADJUSTING THE THROTTLE POSITION SENSOR (TPS) AND IT ACTUALLY MADE THE PROBLEM WORSE. THE NEXT DEALERSHIP REPLACED THE TPS UNIT AND IT HAS BEEN RUNNING FINE SINCE. *AK

Look up ODI 10118730 at NHTSA ↗

321.4%
ODI 10157605 · 4,800 mi

I AM AWARE OF SEVERAL DOZEN PEOPLE WHO HAVE HAD THE SAME PROBLEM I AM NOW HAVING WITH FAILURE OF THE THROTTLE POSITION SENSOR (TPS) ON A 2004-2005 YAMAHA FZ6. THIS CAUSES A NEW VEHICLE TO RUN POORLY AND STALL FREQUENTLY UNTIL THE PART IS REPLACED. *JB

Look up ODI 10157605 at NHTSA ↗

00.0%

No examples available for this selection.

Electrical System
514.7%
ODI 10121061 · 5,000 mi

2004 YAMAHA FZ6 5K+ MILES. WHEN CRUISING AND KEEPING THE ACCELERATOR CONSTANT, ONE EXPERIENCES SUDDEN CHANGES IN ENGINE-TO-TRANSMISSION POWER FEED: THE BIKE SUDDENLY STARTS TO ACCELERATE OR SLOW DOWN. ONE MUST COMPENSATE CONSTATNLY FOR THAT ERRATIC ENGINE BEHAVIOR, WHICH TAKES AWAY FROM PAYING ATTENTION TO THE ROAD. IF DOWNSHIFTING, UPSHIFTING OR CLUTCH DISENGAGEMENT IS PERFORMED DURING THE ENGINE FALTERING, THE RESULT IS A STALLED OUT ENGINE UNLESS SHIFTING IS PERFORMED VERY QUICKLY. STALLING OUT WHILE DOWNSHIFTING FOR A FULL STOP AT AN …

Look up ODI 10121061 at NHTSA ↗

17.1%
ODI 11453978

Hello, i ride this Yamaha FZ-6 motorcycle and I experience poor idling and engine stalls during riding, and last time this nearly led to accident, because the motorcycle slowed down in front of an overpassing automobile. I have bought this bike imported from USA. I am situated in Bulgaria, Europe. I saw there is a recall action about faulty TPS sensor. Kindly requesting any help for replacing this sensor by recall action. Thank you in advance for your kind support. [XXX] INFORMATION Redacted PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5…

Look up ODI 11453978 at NHTSA ↗

150.0%
ODI 10239618 · 1,000 mi

TL*THE CONTACT OWNS A 2006 YAMAHA FZ6. THE CONTACT STATED THAT THE DEALER REPLACED THE BATTERY FOUR TIMES. THE HEADLIGHT AND STARTER WERE REPLACED THREE TIMES. ON AUGUST 23, 2008, THE BATTERY FAILED AGAIN. THE VEHICLE WAS TOWED TO THE CONTACT'S RESIDENCE. SHE CHARGED THE BATTERY FOR SEVERAL HOURS, BUT THE VEHICLE WOULD NOT RESTART. THE VEHICLE WILL BE TAKEN TO THE DEALER FOR A DIAGNOSIS. THE FAILURE MILEAGE WAS 1,000 AND CURRENT MILEAGE WAS 14,000.

Look up ODI 10239618 at NHTSA ↗

Fuel System, Gasoline:Delivery
514.7%
ODI 10118064 · 8,700 mi

1-AVERAGE USAGE, 2-MOTORCYCLES WOULD STALL SPORADICALLY, RPMS WOULD VARY CONSIDERABLY, A LOT OF HESITATION, VARIABLE IDLING, BAD GAS CONSUMPTION. A FAILURE OF THE MOTORCYCLE TO CEASE THROTTLE OPERATIONS THROUGH MID-CORNER DURING A TURN WOULD INEVITABLY CAUSE THE MOTORCYCLE AND ITS RIDER TO LOSE TRACTION AT THE REAR WHEELS. FURTHER CONSEQUENCES WOULD BE DEATH TO THE RIDER IN EXTREME, BUT HIGHLY LIKELY CIRCUMSTANCES. 3-THERE WAS A DEFECTIVE THROTTLE POSITIONING SENSOR WITH THE 2004-2005 YAMAHA FZ6 MOTORCYCLES. YAMAHA HAS SO FAR FAILED TO AN…

Look up ODI 10118064 at NHTSA ↗

214.3%
ODI 10136746 · 100 mi

1) 2005 YAMAHA YZF R1. NORMAL EVERYDAY RIDING FOR 10,000 MILES. AFTER WORK I WARMED UP MY MOTORCYCLE TO 170 DEG F. 2) WHEN I SLOWED DOWN THE RPM'S DROPPED UNDER 1,000 AND THE MOTORCYCLE STALLS/DIES. IT DIED 3 MORE TIMES BEFORE I COULD GET TO A PLACE TO PULL OVER. AFTER I PULLED OVER I GOT OFF MY MOTORCYCLE AND THEN LET IT IDLE. THE IDLE WAS LOW BUT DID NOT DIE. I THEN RIDE MORE AND IT HAPPENED 1 MORE TIME. I HAD TO REV THE ENGINE TO KEEP IT FROM DYING. I STOPPED AND LET THE BIKE SIT FOR OVER 1 HOUR. AFTER I STARTED IT BACK UP EVERYTHIN…

Look up ODI 10136746 at NHTSA ↗

00.0%

No examples available for this selection.

Engine And Engine Cooling:Engine
25.9%
ODI 10134693

1. BIKE STARTED AND WARMED UP FINE. AFTER ABOUT AN HOUR OF RIDING BIKE WAS IDLING VERY LOW AT A STOP SIGN (800-900 RPM). POWER DELIVERY WAS CHOPPY FROM A STOP ALSO. AT THE NEXT STOP LIGHT THE BIKE STALLED, AND I NEEDED TO USE THE THROTTLE TO KEEP IT IDLING . I SHUT THE BIKE OFF AT SOME POINT, TURNED IT BACK ON AND THE BIKE WAS BACK TO NORMAL. AFTER ABOUT 10 MORE MINUTES OF RIDING THE BIKE STALLED AT ANOTHER STOP LIGHT. SINCE FIRST OCCURRENCE THIS PROBLEM HAS BEEN INTERMITTENT BUT USUALLY GOES AWAY IF THE BIKE IS SHUT OFF, THEN TURNED BACK ON. …

Look up ODI 10134693 at NHTSA ↗

214.3%
ODI 10138672 · 1,200 mi

DT: THE CALLER SAID THAT WHILE HE RIDING THE ENGINE ON MOTORCYCLE BROKE OPEN AND ALL THE FLUID SPRAYED OUT. THE CALLER WAS GOING ABOUT 60 MPH. HE ALMOST LOST CONTROL ,BUT WAS ABLE TO STOP AND GET OFF THE MOTORCYCLE. HE HAD TO HAVE IT TOWED. DEALER , WHOSAID THEY WILL LOOK AT IT. THE CALLER CONTACTED THE MANUFACTURER AND LEFT A VOICE MAIL. MOTORCYCLE IS A YAMAHA R-1. *AK

Look up ODI 10138672 at NHTSA ↗

150.0%
ODI 10166197

STICKY VALVES ON YAMAHA MOTORCYCLES,THERE HAVE BEEN NUMEROUS REPORTS OF ENGINES LOCKING UP AND STALLING . I QUESTIONED MY DEALER AND HE DOESN'T KNOW ANYTHING ABOUT IT [ SUPPOSEDLY ] I WANT IT ON THE RECORD IN CASE OF AN ACCIDENT . IT HASN'T HAPPENED YET BUT YAMAHA IS AWARE OF THE PROBLEM AND IT SHOULD BE RECTIFIED BEFORE A SERIOUS INJURY OCCURS . THE VALVE SPRINGS ARE TOO WEAK AND SHOULD BE REPLACED , THE RESULTING CARBON BUILD UP CAUSES THE ENGINE TO STALL AND SPIT FIRE OUT OF THE EXHAUST . THIS PROBLEM SHOULD BE ADDRESSED NOW BEFORE AN ACCID…

Look up ODI 10166197 at NHTSA ↗

Engine And Engine Cooling
00.0%

No examples available for this selection.

428.6%
ODI 10125688 · 100 mi

DT: LOOSE BOLTS ALL OVER THE MOTORCYCLE NOT FROM THE DEALERSHIP, BUT FROM FACTORY. ALSO, FRONT DISC BRAKE JUNCTION BOX FELL OFF/ CASING MOTOR BOLTS WERE LOOSE, AND TAIL LIGHT WAS ABOUT TO FALL OFF. THIS MOTORCYCLE IS A COUPLE OF MONTHS OLD AND HAS ABOUT 1,000 MILES ON IT. CONSUMER OWNED THREE ROADSTARS, HOWEVER, THIS ONE HAS QUALITY CONTROL PROBLEMS. THE DAY AFTER THE MOTORCYCLE WAS PURCHASED DRIVER HEARD CLANKING NOISES. ROUTING OF CLUTCH CABLE WAS RUBBING AGAINST WINDSHIELD AND CHEWING UP THE CABLE. IN ADDITION, LOWER ROUTING, THE R…

Look up ODI 10125688 at NHTSA ↗

00.0%

No examples available for this selection.

Electrical System:Ignition
12.9%
ODI 10169691 · 3,000 mi

YAMAHA 2004 FZ6 BIKE RUNS GOOD FOR A WHILE, AND ALL THE SUDDEN THE ENGINE LOSES 90 % OF ITS POWER, I HAVE TO TURN THE KEY OFF, THEN BACK ON TO REGAIN POWER WHILE IN TRAFFIC, ONE TIME THIS HAPPEN I GAVE IT TO MUCH GAS TO GET OUT OF TRAFFIC ,AND I FLIPPED THE BIKE OVER IN THE MIDDLE OF THE STREET. IT WAS MY LUCKY DAY NOBODY RAN OVER ME. LOOKING AT THIS WEB SITE , THERE IS A LOT OF OTHER FZ6 RIDERS WITH THE SAME PROBLEM, I HAVE ASKED 4 YAMAHA DEALERS IF ANYONE ELSE IS HAVING THIS PROBLEM AND THEY ALL SAID NO? WELL THEY SURE DO BY LOOKING ON THI…

Look up ODI 10169691 at NHTSA ↗

214.3%
ODI 10137531 · 7,500 mi

THE MOTORCYCLE LOSES IGNITION, AS THOUGH THE "KILL SWITCH" WAS PRESSED. THE RPMS DROP TO ZERO AND THERE IS NO THROTTLE RESPONSE, ALTHOUGH LIGHTS AND GAUGES CONTINUE TO WORK. *JB

Look up ODI 10137531 at NHTSA ↗

00.0%

No examples available for this selection.

Fuel System, Other
38.8%
ODI 10118434 · 2,000 mi

IDLE SUDDENLY GETS ROUGH THEN ENGINE QUITS/STALLS AT RANDOM TIMES, MOST OFTEN AT LOW SPEED AFTER DOWNSHIFTING, BUT HAS HAPPENED AT HIGHWAY SPEEDS ON PARKWAY IN TRAFFIC. I'M INVOLVED WITH AN ONLINE USERS GROUP OF FZ6 OWNERS (ABOUT 100-150 IN THE GROUP) AND ABOUT 20 - 25 PEOPLE HAVE HAD TO GET THE THROTTLE POSITION SENSOR (TPS) REPLACED TO CORRECT THE PROBLEM. (WITHIN THE 1ST YEAR OF OWNERSHIP) I BELIEVE MY BIKE IS STARTING TO EXHIBIT SOME OF THE SAME CHARACTERISTICS THEY ALL HAD AND FEEL YAMAHA SHOULD LOOK INTO THIS FOR A RECALL BEFORE SO…

Look up ODI 10118434 at NHTSA ↗

00.0%

No examples available for this selection.

00.0%

No examples available for this selection.

Darker cells indicate a larger share of submitted complaints. Components overlap. This measures complaint composition, not failure probability.

Failure mileage by component

Median and middle 50% of usable owner-reported mileages. Ranges require at least five records.

Component failure mileage distribution
ComponentMileage range (25th–75th percentile)MedianUsable recordsExamples
Fuel System, Gasoline:Fuel Injection System5,308–8,800 mi7,800 mi7
ODI 10118576 · 8,000 mi

1) AT APPROXIMATELY 8000 MILES ON THE ODOMETER, MY YAMAHA FZ6 BEGAN EXHIBITING PERIODIC STALLING. WHEN UNDER NORMAL POWER, THE BIKE EXHIBITED A MODERATE LOSS OF POWER, WITH A COMPLETE ENGINE STALL ONCE THE CLUTCH WAS DISENGAGED (WHILE STOPPING IN TRAFFIC OR PARKING). THESE SYMPTOMS INCREASED IN FREQUENCY UNTIL IT WAS HAPPENING SEVERAL TIMES PER DAY. 2) THE CONSEQUENCES OF THE FAILURE WERE GENERALLY MINIMAL, WITH THE EXCEPTION OF STALLING IN STOP-AND-GO TRAFFIC. ON MORE THAN ONE OCCASION, THE STALLING PREVENTED ME FROM MOVING WHEN TRAFFIC …

Look up ODI 10118576 at NHTSA ↗

ODI 10125026 · 9,600 mi

I WAS RETURNING HOME TO PLANO, TX FROM A WEEKEND TRIP TO COLORADO. I WAS ABOUT AN HOUR AWAY FROM HOME, WHEN I STARTED TO EXPERIENCE ENGINE HESITATION WHENEVER I RELEASED AND REAPPLIED THE THROTTLE. THE NEXT DAY, THE HESITATION WAS GONE, BUT I NOTICED THAT MY FUEL MILEAGE HAD GONE WAY DOWN (FORMERLY 42-45 MPG TO THE CURRENT 35 MPG). THE ENGINE IS ALSO RUNNING RICH, ENOUGH THAT I CAN SMELL UNBURNT FUEL IN THE EXHAUST. THE ENGINE ALSO HAS STARTED TO IDLE ERRATICALLY, FLUCTUATING IN RPMS.

Look up ODI 10125026 at NHTSA ↗

ODI 10127497 · 5,000 mi

THE MOTORCYCLE STALLED REPEATEDLY IN HIGHWAY TRAFFIC.

Look up ODI 10127497 at NHTSA ↗

Vehicle Speed Control4,400–8,000 mi4,550 mi5
ODI 10118730 · 4,400 mi

1. BIKE WAS BADLY HESITATING STARTING OFF IN 1ST GEAR FROM A STOP. 2. TURNING THE THROTTLE TO ACCELERATE WOULD SOMETIMES PITCH ME FORWARD ON THE START AS THE ENGINE HESITATED, THEN TURNING IT A BIT MORE WOULD ALMOST THROW ME OFF AS IT ACCELERATED. 3. ONE DEALERSHIP TRIED ADJUSTING THE THROTTLE POSITION SENSOR (TPS) AND IT ACTUALLY MADE THE PROBLEM WORSE. THE NEXT DEALERSHIP REPLACED THE TPS UNIT AND IT HAS BEEN RUNNING FINE SINCE. *AK

Look up ODI 10118730 at NHTSA ↗

ODI 10118772 · 100 mi

TPS CAUSING STALLING AND ERRATIC IDLE. PROBLEM OCCURS MORE WHEN BIKE IS WARM, OFF, THEN RE-STARTED. HAVE ONLY HAD IT STALL ONCE WHILE RIDING. HAPPENS MORE OFTEN AS ABOVE. *AK

Look up ODI 10118772 at NHTSA ↗

ODI 10132562 · 4,550 mi

BIKE STALLS WHEN CLUTCH IS PULLED IN. RPM'S DROP TO ZERO. WAS ALMOST RUN OVER BY TRAFFIC BEHIND ME WHEN ENGINE STALLS. INJURED MYSELF (FOOT/ANKLE) WHEN TRYING TO PUSH THE BIKE OFF THE ROAD (SO I WOULDN'T BE RUN OVER). I'VE BEEN TOLD BY MANY FZ6 RIDERS THAT MANY OF THE FZ6 BIKES HAVE DEFECTIVE THROTTLE POSITIONING SENSORS (TPS) AND THAT YAMAHA HAS NOT RECOGNIZED THE PROBLEM. I BELIEVE IT TO BE A VERY SERIOUS SAFETY ISSUE. SOONER OR LATER, SOMEONE IS GOING TO GET RUN OVER BECAUSE OF THIS DEFECTIVE SENSOR. *NM

Look up ODI 10132562 at NHTSA ↗

Electrical System5,000–8,000 mi6,500 mi5
ODI 10121061 · 5,000 mi

2004 YAMAHA FZ6 5K+ MILES. WHEN CRUISING AND KEEPING THE ACCELERATOR CONSTANT, ONE EXPERIENCES SUDDEN CHANGES IN ENGINE-TO-TRANSMISSION POWER FEED: THE BIKE SUDDENLY STARTS TO ACCELERATE OR SLOW DOWN. ONE MUST COMPENSATE CONSTATNLY FOR THAT ERRATIC ENGINE BEHAVIOR, WHICH TAKES AWAY FROM PAYING ATTENTION TO THE ROAD. IF DOWNSHIFTING, UPSHIFTING OR CLUTCH DISENGAGEMENT IS PERFORMED DURING THE ENGINE FALTERING, THE RESULT IS A STALLED OUT ENGINE UNLESS SHIFTING IS PERFORMED VERY QUICKLY. STALLING OUT WHILE DOWNSHIFTING FOR A FULL STOP AT AN …

Look up ODI 10121061 at NHTSA ↗

ODI 10132562 · 4,550 mi

BIKE STALLS WHEN CLUTCH IS PULLED IN. RPM'S DROP TO ZERO. WAS ALMOST RUN OVER BY TRAFFIC BEHIND ME WHEN ENGINE STALLS. INJURED MYSELF (FOOT/ANKLE) WHEN TRYING TO PUSH THE BIKE OFF THE ROAD (SO I WOULDN'T BE RUN OVER). I'VE BEEN TOLD BY MANY FZ6 RIDERS THAT MANY OF THE FZ6 BIKES HAVE DEFECTIVE THROTTLE POSITIONING SENSORS (TPS) AND THAT YAMAHA HAS NOT RECOGNIZED THE PROBLEM. I BELIEVE IT TO BE A VERY SERIOUS SAFETY ISSUE. SOONER OR LATER, SOMEONE IS GOING TO GET RUN OVER BECAUSE OF THIS DEFECTIVE SENSOR. *NM

Look up ODI 10132562 at NHTSA ↗

ODI 10137517 · 6,500 mi

MOTORCYCLE RANDOMLY WILL NOT IDLE AND STALLS BETWEEN SHIFTS. HAS HAPPENED 5 OR 6 TIMES. DEALER SAYS DESCRIBED SYMPTOMS CANNOT NOT BE DIAGNOSED WITHOUT FAULT CODES. FAULT CODES ARE NOT STORED UNLESS CERTAIN "IDIOTIC LIGHTS" COME ON DURING FAILURE. *NM

Look up ODI 10137517 at NHTSA ↗

Fuel System, Gasoline:Delivery5,000–7,400 mi6,000 mi5
ODI 10118064 · 8,700 mi

1-AVERAGE USAGE, 2-MOTORCYCLES WOULD STALL SPORADICALLY, RPMS WOULD VARY CONSIDERABLY, A LOT OF HESITATION, VARIABLE IDLING, BAD GAS CONSUMPTION. A FAILURE OF THE MOTORCYCLE TO CEASE THROTTLE OPERATIONS THROUGH MID-CORNER DURING A TURN WOULD INEVITABLY CAUSE THE MOTORCYCLE AND ITS RIDER TO LOSE TRACTION AT THE REAR WHEELS. FURTHER CONSEQUENCES WOULD BE DEATH TO THE RIDER IN EXTREME, BUT HIGHLY LIKELY CIRCUMSTANCES. 3-THERE WAS A DEFECTIVE THROTTLE POSITIONING SENSOR WITH THE 2004-2005 YAMAHA FZ6 MOTORCYCLES. YAMAHA HAS SO FAR FAILED TO AN…

Look up ODI 10118064 at NHTSA ↗

ODI 10122558 · 6,000 mi

THROTTLE "JUMPS" UNEXPECTEDLY DURING NORMAL OPERATIONS OF THE MOTORCYCLE. WHEN TRAVELING SPEED WILL DECREASE AND THE ENGINE WILL "SPUTTER", THEN THE ENGINE WILL JUMP BACK TO SPEED CAUSING A JOLT FORWARD. SYMPOTMS BEST DESCRIBED AND THE FUEL BEING CUT OFF THEN ON AGAIN.

Look up ODI 10122558 at NHTSA ↗

ODI 10129651 · 5,000 mi

IN SEPTEMBER OF 2004 AT APPROXIMATELY 5000 MILES, THE MOTORCYCLE BEGAN IDLING POORLY AND STALLING. HAD TO TURN OFF THE KEY AND THEN BACK ON BEFORE IT WOULD START AGAIN. YAMAHA REPLACED THE THROTTLE POSITION SENSOR AFTER BRINGING IT TO THEM TWICE WHICH CORRECTED THE PROBLEM. I HAVE ALMOST 13000 MILES ON IT NOW AND IT IS DOING THE SAME THING AGAIN. IT IS A SAFETY ISSUE BECAUSE IT IS DISTRACTING AND HINDERS MY ABILITY TO WATCH TRAFFIC AND FREQUENTLY STALLS AT TRAFFIC LIGHTS.

Look up ODI 10129651 at NHTSA ↗

Fuel System, OtherToo few reports for a range8,950 mi3 (sparse)
ODI 10118434 · 2,000 mi

IDLE SUDDENLY GETS ROUGH THEN ENGINE QUITS/STALLS AT RANDOM TIMES, MOST OFTEN AT LOW SPEED AFTER DOWNSHIFTING, BUT HAS HAPPENED AT HIGHWAY SPEEDS ON PARKWAY IN TRAFFIC. I'M INVOLVED WITH AN ONLINE USERS GROUP OF FZ6 OWNERS (ABOUT 100-150 IN THE GROUP) AND ABOUT 20 - 25 PEOPLE HAVE HAD TO GET THE THROTTLE POSITION SENSOR (TPS) REPLACED TO CORRECT THE PROBLEM. (WITHIN THE 1ST YEAR OF OWNERSHIP) I BELIEVE MY BIKE IS STARTING TO EXHIBIT SOME OF THE SAME CHARACTERISTICS THEY ALL HAD AND FEEL YAMAHA SHOULD LOOK INTO THIS FOR A RECALL BEFORE SO…

Look up ODI 10118434 at NHTSA ↗

ODI 10118605 · 8,950 mi

THROTTLE POSITION SENSOR ISSUE WELL DOCUMENTED ON HTTP://FORUMS.SPORTBIKES.NET/FORUMS...088#POST1774088 STALLING ON FREEWAY, COULD CAUSE ACCIDENT. HAS NOT BEEN FIXED BY YAMAHA.

Look up ODI 10118605 at NHTSA ↗

ODI 10120825 · 13,799 mi

2004 YAMAHA FZ6 13K+ MILES. DURING A SUSTAINED CRUISE, WITH A SUSTAINED RPM BETWEEN 4K AND 5K RPM, THE ENGINE BEGAN FALTERING/BOGGING DOWN AND RUNNING VERY ROUGH. ACCOMPANYING THIS ISSUE, THERE IS A MARKED SENSE OF DECELERATION UNLESS MORE THROTTLE IS APPLIED TO COMPENSATE FOR THE THE LOSS OF POWER; THE DECELERATION, AT TIMES, CAN BE QUITE SUDDEN. THIS PROBLEM TENDS TO OCCUR BEYOND 1/2 HOUR OF OPERATION. IF DOWNSHIFTING OR UPSHIFTING IS PERFORMED DURING THE ENGINE FALTERING, THE RESULT IS A STALLED OUT ENGINE UNLESS SHIFTING IS PERFORMED VERY Q…

Look up ODI 10120825 at NHTSA ↗

Engine And Engine Cooling:EngineToo few reports for a range300 mi1 (sparse)
ODI 10161468 · 300 mi

MOTORCYCLE SHUTS OFF AFTER REDUCING THROTTLE DURING DECELERATION AND DURING SHIFTING. MANY RIDERS OF THE SAME MODEL MOTORCYCLE HAVE REPORTED THE SAME PROBLEM. THIS IS DANGEROUS BECAUSE THE BIKE IS W/O POWER AND SOMETIMES DURING DOWNSHIFTING THE REAR TIRE LOSES TRACTION AND CAUSES THE BIKE TO SLIDE SIDEWAYS. *NM

Look up ODI 10161468 at NHTSA ↗

Fuel System, Other:DeliveryToo few reports for a range15,570 mi2 (sparse)
ODI 10125081 · 11,300 mi

ENGINE HESITATION, MISSING AT HIGHWAY SPEEDS, ENGINE SHUTS OFF WITH NO THROTTLE. THIS IS A KNOWN ISSUE WITH YAMAHA AS TPS FAILURE ON THE FZ6.

Look up ODI 10125081 at NHTSA ↗

ODI 10153851 · 19,840 mi

VEHICLE: 2004 YAMAHA FZ6 MOTORCYCLE, PURCHASE NEW 12/93. INTERMITTENTLY, THE ENGINE SURGES, CUTS OUT, LUGS, STALLS/QUITS AT VARYING TIMES AND SPEEDS/RIDING SITUATIONS. STOPPING THE BIKE, TURNING IGNITION OFF AND ON TEMPORARILY CORRECTS PROBLEM, BUT PROBLEM ALWAYS RECURS. DIFFERENT WEATHER TEMPERATURES AND FUEL GRADES HAVE NO POSITIVE EFFECT. BIKE MAY STALL AT AN INTERSECTION STOP, AT HIGHWAY SPEED, ACCELERATING OR DECELERATING, ON STRAIGHT OR CORNERS, WHICH CAN BE TERRIFYING--NOT TO MENTION POTENTIALLY FATAL. NOTE: DATE LISTED BELOW IS ONL…

Look up ODI 10153851 at NHTSA ↗

Electrical System:IgnitionToo few reports for a range3,000 mi1 (sparse)
ODI 10169691 · 3,000 mi

YAMAHA 2004 FZ6 BIKE RUNS GOOD FOR A WHILE, AND ALL THE SUDDEN THE ENGINE LOSES 90 % OF ITS POWER, I HAVE TO TURN THE KEY OFF, THEN BACK ON TO REGAIN POWER WHILE IN TRAFFIC, ONE TIME THIS HAPPEN I GAVE IT TO MUCH GAS TO GET OUT OF TRAFFIC ,AND I FLIPPED THE BIKE OVER IN THE MIDDLE OF THE STREET. IT WAS MY LUCKY DAY NOBODY RAN OVER ME. LOOKING AT THIS WEB SITE , THERE IS A LOT OF OTHER FZ6 RIDERS WITH THE SAME PROBLEM, I HAVE ASKED 4 YAMAHA DEALERS IF ANYONE ELSE IS HAVING THIS PROBLEM AND THEY ALL SAID NO? WELL THEY SURE DO BY LOOKING ON THI…

Look up ODI 10169691 at NHTSA ↗

Complaint and recall timeline

Explore monthly filing activity alongside recall announcements. Up to ten years of monthly history is available.

1 reports2024-112026-10

Solid line: filed complaints. Dashed amber lines: recall announcement dates for this vehicle selection; markers include all recall components. The latest month is partial. Temporal proximity does not establish causation.

Monthly counts, recall campaigns and complaint examples
Monthly complaint and recall timeline
MonthComplaintsCampaigns announcedExamples
2024-110None

No examples available for this selection.

2024-120None

No examples available for this selection.

2025-010None

No examples available for this selection.

2025-020None

No examples available for this selection.

2025-030None

No examples available for this selection.

2025-040None

No examples available for this selection.

2025-050None

No examples available for this selection.

2025-060None

No examples available for this selection.

2025-070None

No examples available for this selection.

2025-080None

No examples available for this selection.

2025-090None

No examples available for this selection.

2025-100None

No examples available for this selection.

2025-110None

No examples available for this selection.

2025-120None

No examples available for this selection.

2026-010None

No examples available for this selection.

2026-020None

No examples available for this selection.

2026-030None

No examples available for this selection.

2026-040None

No examples available for this selection.

2026-050None

No examples available for this selection.

2026-060None

No examples available for this selection.

2026-070None

No examples available for this selection.

2026-080None

No examples available for this selection.

2026-090None

No examples available for this selection.

2026-10 (partial)0None

No examples available for this selection.

Emerging complaint spikes

Complete months in the latest six months with at least 10 complaints, at least twice the preceding 12-month average, and at least three square-root deviations above that average.

This is a descriptive screening rule, not a statistical defect finding. Publicity and reporting changes can increase submissions.

No complete months meet the spike thresholds for this selection.

Equal-age model-year comparison

Model-wide cumulative reports during the first three or five calendar years, starting with the model year (age 0). Only fully elapsed windows are compared.

Age 0Age 1Age 212 reports

2005: 12 complaints · 2006: 2 complaints

Equal observation windows
Model yearThrough age 0Through age 1Through age 2
200581212
2006112
Date coverage across each selected cohort
Date basis for all complaints in selected model years
YearIncident dates usedFiling date fallbacksExcluded dates
20051400
2006200

Incident date is preferred when valid and no later than filing; otherwise filing date is used. Model year approximates age. Equal observation time does not adjust for sales, distance driven or reporting delays. One complaint linked to multiple model years can appear in each cohort.

Components reported together

Each cell counts unique complaints naming both components. Open a nonzero cell for examples.

Component co-occurrence matrix
ComponentFuel System, Gasoline:Fuel Injection SystemVehicle Speed ControlElectrical SystemFuel System, Gasoline:DeliveryFuel System, OtherEngine And Engine Cooling:EngineFuel System, Other:DeliveryElectrical System:Ignition
Fuel System, Gasoline:Fuel Injection System—0000000
Vehicle Speed Control0—
1
ODI 10132562 · 4,550 mi

BIKE STALLS WHEN CLUTCH IS PULLED IN. RPM'S DROP TO ZERO. WAS ALMOST RUN OVER BY TRAFFIC BEHIND ME WHEN ENGINE STALLS. INJURED MYSELF (FOOT/ANKLE) WHEN TRYING TO PUSH THE BIKE OFF THE ROAD (SO I WOULDN'T BE RUN OVER). I'VE BEEN TOLD BY MANY FZ6 RIDERS THAT MANY OF THE FZ6 BIKES HAVE DEFECTIVE THROTTLE POSITIONING SENSORS (TPS) AND THAT YAMAHA HAS NOT RECOGNIZED THE PROBLEM. I BELIEVE IT TO BE A VERY SERIOUS SAFETY ISSUE. SOONER OR LATER, SOMEONE IS GOING TO GET RUN OVER BECAUSE OF THIS DEFECTIVE SENSOR. *NM

Look up ODI 10132562 at NHTSA ↗

00000
Electrical System0
1
ODI 10132562 · 4,550 mi

BIKE STALLS WHEN CLUTCH IS PULLED IN. RPM'S DROP TO ZERO. WAS ALMOST RUN OVER BY TRAFFIC BEHIND ME WHEN ENGINE STALLS. INJURED MYSELF (FOOT/ANKLE) WHEN TRYING TO PUSH THE BIKE OFF THE ROAD (SO I WOULDN'T BE RUN OVER). I'VE BEEN TOLD BY MANY FZ6 RIDERS THAT MANY OF THE FZ6 BIKES HAVE DEFECTIVE THROTTLE POSITIONING SENSORS (TPS) AND THAT YAMAHA HAS NOT RECOGNIZED THE PROBLEM. I BELIEVE IT TO BE A VERY SERIOUS SAFETY ISSUE. SOONER OR LATER, SOMEONE IS GOING TO GET RUN OVER BECAUSE OF THIS DEFECTIVE SENSOR. *NM

Look up ODI 10132562 at NHTSA ↗

—00000
Fuel System, Gasoline:Delivery000—0000
Fuel System, Other0000—000
Engine And Engine Cooling:Engine00000—00
Fuel System, Other:Delivery000000—0
Electrical System:Ignition0000000—

Co-reporting does not establish that one component caused another concern.

Recurring narrative patterns

Specific keyword mentions beyond broad component labels. Matching includes negations and comparisons and does not confirm a diagnosis.

2 patterns with matching reports.

Stalling or loss of power

26 mentions · 76.5% of complaints

Median mileage: 7,600 mi (24 usable records).

ODI 10118064 · 8,700 mi

1-AVERAGE USAGE, 2-MOTORCYCLES WOULD STALL SPORADICALLY, RPMS WOULD VARY CONSIDERABLY, A LOT OF HESITATION, VARIABLE IDLING, BAD GAS CONSUMPTION. A FAILURE OF THE MOTORCYCLE TO CEASE THROTTLE OPERATIONS THROUGH MID-CORNER DURING A TURN WOULD INEVITABLY CAUSE THE MOTORCYCLE AND ITS RIDER TO LOSE TRACTION AT THE REAR WHEELS. FURTHER CONSEQUENCES WOULD BE DEATH TO THE RIDER IN EXTREME, BUT HIGHLY LIKELY CIRCUMSTANCES. 3-THERE WAS A DEFECTIVE THROTTLE POSITIONING SENSOR WITH THE 2004-2005 YAMAHA FZ6 MOTORCYCLES. YAMAHA HAS SO FAR FAILED TO AN…

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ODI 10118434 · 2,000 mi

IDLE SUDDENLY GETS ROUGH THEN ENGINE QUITS/STALLS AT RANDOM TIMES, MOST OFTEN AT LOW SPEED AFTER DOWNSHIFTING, BUT HAS HAPPENED AT HIGHWAY SPEEDS ON PARKWAY IN TRAFFIC. I'M INVOLVED WITH AN ONLINE USERS GROUP OF FZ6 OWNERS (ABOUT 100-150 IN THE GROUP) AND ABOUT 20 - 25 PEOPLE HAVE HAD TO GET THE THROTTLE POSITION SENSOR (TPS) REPLACED TO CORRECT THE PROBLEM. (WITHIN THE 1ST YEAR OF OWNERSHIP) I BELIEVE MY BIKE IS STARTING TO EXHIBIT SOME OF THE SAME CHARACTERISTICS THEY ALL HAD AND FEEL YAMAHA SHOULD LOOK INTO THIS FOR A RECALL BEFORE SO…

Look up ODI 10118434 at NHTSA ↗

ODI 10118576 · 8,000 mi

1) AT APPROXIMATELY 8000 MILES ON THE ODOMETER, MY YAMAHA FZ6 BEGAN EXHIBITING PERIODIC STALLING. WHEN UNDER NORMAL POWER, THE BIKE EXHIBITED A MODERATE LOSS OF POWER, WITH A COMPLETE ENGINE STALL ONCE THE CLUTCH WAS DISENGAGED (WHILE STOPPING IN TRAFFIC OR PARKING). THESE SYMPTOMS INCREASED IN FREQUENCY UNTIL IT WAS HAPPENING SEVERAL TIMES PER DAY. 2) THE CONSEQUENCES OF THE FAILURE WERE GENERALLY MINIMAL, WITH THE EXCEPTION OF STALLING IN STOP-AND-GO TRAFFIC. ON MORE THAN ONE OCCASION, THE STALLING PREVENTED ME FROM MOVING WHEN TRAFFIC …

Look up ODI 10118576 at NHTSA ↗

Matching rule\b(stall\w*|loss of power|lost power|engine shut\w* off)\b

Fuel smell or leak mentions

1 mentions · 2.9% of complaints

Median mileage: 7,400 mi (1 usable records).

ODI 10135318 · 7,400 mi

TROTTLE CHUNKY/DELAYED/ERRATIC, MAKING MOTORCYCLE DIFFICULT TO CONTROL IN CORNERS. STALLS AT STOPS, A DANGEROUS SITUATION IN CITY TRAFFIC. DOES NOT IDLE, I NEED TO KEEP THE THROTTLE SLIGHTLY ROLLED ON. RUNS ROUGH, SMELLS OF GAS, SEEMS TO MISS. PROBLEMS STARTED WITH THROTTLE DELAY AT 7000 MILES, STALLING STARTED AT 7400 MILES. *JB

Look up ODI 10135318 at NHTSA ↗

Matching rule\b(fuel leak\w*|gas leak\w*|gas(?:oline)? smell|smell\w* (?:of )?(?:fuel|gas))\b