2012 Yamaha YP400: complaints, problems and recalls
Explore the records behind recurring owner reports.
Key facts
1 owner complaints analyzed
0 distinct recall campaigns
4,500 mi median reported failure mileage
Scope: 2012 model year. Data updated: . 1 complaints include usable failure mileage. View data status.
This selection has limited data. It remains available for lookup but is excluded from search indexing.
Most common problems
Electrical System is the most frequently named component, appearing in 1 of 1 complaints (100.0%). A complaint can name multiple components.
Component breakdown
Number of unique complaints naming each component. Top eight shown.
| Category | Count |
|---|---|
| Electrical System | 1 |
Electrical System: 1
Reported problems by failure mileage
Complaint counts in mileage bands. These are not failure rates per vehicle or mile.
| Category | Count |
|---|---|
| Under 25,000 | 1 |
| 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: 1; 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 (1). 0 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.
| Category | Count |
|---|---|
| 2018 | 1 |
2018: 1
Pattern summary
Electrical System leads the component reports. 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.
Examples from the source records
Examples provide context, not a representative sample or a verified diagnosis.
Owner report 11099418 · 2018-06-03 (June 3, 2018)
TURN SIGNALS- WHEN USING THE LEFT SIGNAL, THE RIGHT FRONT SIGNAL FLASHES AND THE REAR LEFT SIGNAL FLASHES. WHEN USING THE RIGHT SIGNAL, THE LEFT FRONT SIGNAL FLASHES AND THE RIGHT REAR SIGNAL FLASHES. THIS HAPPENS AT ALL TIMES.
Owner-reported narrative. 4,500 miles reported. Look up ODI 11099418 at NHTSA ↗
Recall history
0 distinct campaigns affect this selection. Announcement dates below are different from vehicle model years. A campaign may cover multiple years.
No recall campaigns are recorded in this snapshot.
Vehicle analysis explorer
Inspect model-year patterns, reported mileage, monthly activity and the evidence behind each signal.
Data completeness
1 unique complaints in this selection. Analysis snapshot: 2026-10-01.
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 | 2005 | 2006 | 2007 | 2008 | 2012 |
|---|---|---|---|---|---|
| Electrical System | 116.7% | 00.0%No examples available for this selection. | 150.0%ODI 10230342 · 480 miSCOOTER STALLS AND IS HARD TO START AGAIN. JUST PURCHASED THE SCOOTER LESS THAN 60 DAYS AGO AND IT IS UNRELIABLE AS WE HAVE BEEN STUCK TWICE IN ONE DAY. *TR | 00.0%No examples available for this selection. | 1100.0%ODI 11099418 · 4,500 miTURN SIGNALS- WHEN USING THE LEFT SIGNAL, THE RIGHT FRONT SIGNAL FLASHES AND THE REAR LEFT SIGNAL FLASHES. WHEN USING THE RIGHT SIGNAL, THE LEFT FRONT SIGNAL FLASHES AND THE RIGHT REAR SIGNAL FLASHES. THIS HAPPENS AT ALL TIMES. |
| Engine And Engine Cooling | 233.3%ODI 10223529 · 3,000 miVEHICLE STALLS WHEN ATTEMPTING TO ACCELERATE NORMALLY (TYPICALLY STALLS IN INTERSECTION). NOT FREQUENT. VEHICLE RESTARTS NORMALLY. OCCURS WHEN ENGINE IS FULLY WARMED UP. *TR | 00.0%No examples available for this selection. | 00.0%No examples available for this selection. | 00.0%No examples available for this selection. | 00.0%No examples available for this selection. |
| Engine And Engine Cooling:Engine | 116.7%ODI 10201010 · 12,100 mi2005 YAMAHA MAJESTY 400CC SCOOTER STALLING IN TRAFFIC. ENGINE WAS WARM, COMING TO A STOP. ENGINE STALLED AROUND 5-10MPH. THIS IS THE 5TH TIME SINCE NEW. CONDITION VERY SERIOUS, AS I WAS ALMOST RUN OVER BY TRAFFIC DUE TO SUDDEN LOSS OF POWER/DRIVE. THIS IS A LAWSUIT FOR SURE. ON A VERY SMALL YAMAHA SCOOTER FORUM, THERE ARE ALREADY 38 OTHER RIDERS WITH THIS EXACT SAME SCOOTER THAT HAS STALLED AT LEAST ONCE. HTTP://MAJESTYUSA.COM/FORUMS/VIEWTOPIC.PHP?T=486&POSTDAYS=0&POSTORDER=ASC&START=0. THIS IS A VERY SERIOUS COMPLAINT I'M FILING. I AL… | 133.3%ODI 10282435 · 2,451 miTL*THE CONTACT OWNS A 2006 YAMAHA YP400V. THE CONTACT STATED THAT WHILE DRIVING 10 MPH, THE SCOOTER STALLED WITHOUT ANY PRIOR WARNINGS. AS A CONSEQUENCE HIS RISK FOR SERIOUS INJURY AND CRASH WERE INCREASED. THE SCOOTER WAS TAKEN TO A DEALERSHIP IN WHICH A TECHNICIAN CONCLUDED THAT THE FUEL INJECTOR WAS THE CAUSE OF THE FAILURE. THE FAILURES HAVE NOT BEEN REMEDIED AS OF CURRENT DATE THEREFORE THE SAFETY RISK IS PRESENT. THE CURRENT AND FAILURE MILEAGES WERE 2451. UPDATED 12/30/09 *BF THE DEALER CLEANED THE ELECTRIC FUEL PUMP CONNECTORS. T… | 00.0%No examples available for this selection. | 00.0%No examples available for this selection. | 00.0%No examples available for this selection. |
| Fuel System, Gasoline | 00.0%No examples available for this selection. | 133.3%ODI 10272788 · 600 miTL*THE CONTACT OWNS A 2006 YAMAHA YP400 MOTORCYCLE. THE VEHICLE WAS REPAIRED ACCORDING TO NHTSA CAMPAIGN ID NUMBER 08V180000 (FUEL SYSTEM, GASOLINE:DELIVERY:FUEL PUMP); HOWEVER, IT CONTINUES TO STALL AND SHUT OFF. THE CONTACT FEELS THAT THE ACTUAL HARNESS WAS NOT REPLACED ACCORDING TO THE REMEDY, AND WAS ONLY INSPECTED AT THE TIME OF THE REPAIR. THE MANUFACTURER INFORMED HIM TO TAKE THE VEHICLE BACK TO THE DEALER FOR FURTHER INSPECTION SINCE THE VEHICLE WAS ORIGINALLY REPAIRED UNDER RECALL. THE CONTACT INQUIRED ABOUT REPLACING THE HARNESS A… | 00.0%No examples available for this selection. | 1100.0%ODI 10409589 · 2,360 miTHIS IS A 400CC MOTOR SCOOTER BEING RIDDEN DURING AN 85 DEGREE DAY. THE VEHICLE ENGINE STALLED AFTER ENTERING A BUSY INTERSECTION AND COULD NOT BE RESTARTED. AFTER PUSHING THE VEHICLE OUT OF THE INTERSECTION, ATTEMPTS TO RESTART FOR OVER AN HOUR FAILED AND THE VEHICLE WAS TRAILERED HOME. THIS SCENARIO WAS ( HOT TEMPERATURE STALL AND FAILED RESTART) WAS REPEATED AT MY RESIDENCE ON THREE DIFFERENT OCCASIONS. THE VEHICLE WAS TAKEN TO THE YAMAHA DEALERSHIP, DIAGNOSED WITH A FUEL PUMP ASSEMBLY FAILURE, AND CONFIRMED REPAIR UPON PUMP REPLACEMENT. IT … | 00.0%No examples available for this selection. |
| Fuel/Propulsion System | 00.0%No examples available for this selection. | 133.3%ODI 10614652 · 19,950 miACCELERATING FROM STOP INTO A LEFT TURN AT AN INTERSECTION THE ENGINE JUST DIED AND WE ALMOST FELL BECAUSE A BUMP AND BRAKE LIKE EVENT OCCURRED WITH THE BIKE LEANING OVER FOR THE TURN, THIS WAS VERY UNSETTLING. SIMILAR EVENTS HAD OCCURRED PREVIOUSLY AFTER STARTING TO ACCELERATE FROM A STOP OR A NEAR STOP. THEY HAD OCCURRED WHEN DRIVING IN A STRAIGHT LINE AND THE ENGINE RESTARTING RIGHT UP AFTER EACH INCIDENT. THIS LAST TIME IT OCCURRED WITH THE BIKE LEANING, WITH A LITTLE HIGHER MOMENTUM BECAUSE OF A HIGHER SPEED AND IT HAPPENED AT THE WORST PL… | 150.0%ODI 10611142 · 4,000 miIN HOT WEATHER, THE YAMAHA YP400 FAILS TO START, STALLS AT IDLE, AND INTERMITTENTLY CUTS FUEL AT HIGH SPEED. SYMPTOMS ARE NONEXISTENT UNTIL THE AIR TEMPERATURE EXCEEDS ABOUT 95 DEGREES F. SIMILAR PROBLEMS WITH THE FUEL PUMPS ARE FREQUENTLY DOCUMENTED WITH OWNERS OF MAJESTY YP400 MODELS AS WELL AS T-MAX XP500 AND ZUMA YW125, THE LAST OF WHICH WAS SUBJECT TO A RECALL OF ITS OWN. *TR | 00.0%No examples available for this selection. | 00.0%No examples available for this selection. |
| Electrical System:Software | 116.7%ODI 10224148 · 320 miI HAD A NEW 2005 MAJESTY (YAMAHA) SCOOTER. IT WOULD ON OCCASION STALL. I HAD IT TWICE STALL WHILE MERGING ONTO THE FREEWAY. THIS ALMOST RESULTED IN A CRASH, BUT I WAS ABLE TO GET TO THE SHOULDER AND RESTART THE ENGINE. THE DEALER REPLACED THE ECU AND I HAVE NOT ANY PROBLEMS SINCE. *TR | 00.0%No examples available for this selection. | 00.0%No examples available for this selection. | 00.0%No examples available for this selection. | 00.0%No examples available for this selection. |
| Engine | 116.7%ODI 10556583 · 9,600 miONCE ENGINE WAS WARMED UP, VEHICLE STALLED AT STOPLIGHTS TWICE AND ONCE WHEN STARTING TO MOVE AFTER A STOP (WHEN IN AN INTERSECTION). OTHER TIMES WHEN STOPPED. IDLE SPEED DROPPED BELOW 1400, UNDER WHICH IT STALLS, AND IT WAS DIFFICULT TO REV THE ENGINE TO PREVENT STALLING SINCE THERE IS NO NEUTRAL GEAR, SO REVVING MORE THAN SLIGHTLY CAN MAKE THE VEHICLE MOVE. *TR | 00.0%No examples available for this selection. | 00.0%No examples available for this selection. | 00.0%No examples available for this selection. | 00.0%No examples available for this selection. |
| Fuel System, Gasoline:Delivery:Fuel Pump | 00.0%No examples available for this selection. | 133.3%ODI 10282435 · 2,451 miTL*THE CONTACT OWNS A 2006 YAMAHA YP400V. THE CONTACT STATED THAT WHILE DRIVING 10 MPH, THE SCOOTER STALLED WITHOUT ANY PRIOR WARNINGS. AS A CONSEQUENCE HIS RISK FOR SERIOUS INJURY AND CRASH WERE INCREASED. THE SCOOTER WAS TAKEN TO A DEALERSHIP IN WHICH A TECHNICIAN CONCLUDED THAT THE FUEL INJECTOR WAS THE CAUSE OF THE FAILURE. THE FAILURES HAVE NOT BEEN REMEDIED AS OF CURRENT DATE THEREFORE THE SAFETY RISK IS PRESENT. THE CURRENT AND FAILURE MILEAGES WERE 2451. UPDATED 12/30/09 *BF THE DEALER CLEANED THE ELECTRIC FUEL PUMP CONNECTORS. T… | 00.0%No examples available for this selection. | 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 | Mileage range (25th–75th percentile) | Median | Usable records | Examples |
|---|---|---|---|---|
| Electrical System | Too few reports for a range | 4,500 mi | 1 (sparse) | ODI 11099418 · 4,500 miTURN SIGNALS- WHEN USING THE LEFT SIGNAL, THE RIGHT FRONT SIGNAL FLASHES AND THE REAR LEFT SIGNAL FLASHES. WHEN USING THE RIGHT SIGNAL, THE LEFT FRONT SIGNAL FLASHES AND THE RIGHT REAR SIGNAL FLASHES. THIS HAPPENS AT ALL TIMES. |
Complaint and recall timeline
Explore monthly filing activity alongside recall announcements. Up to ten years of monthly history is available.
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
| Month | Complaints | Campaigns announced | Examples |
|---|---|---|---|
| 2024-11 | 0 | None | No examples available for this selection. |
| 2024-12 | 0 | None | No examples available for this selection. |
| 2025-01 | 0 | None | No examples available for this selection. |
| 2025-02 | 0 | None | No examples available for this selection. |
| 2025-03 | 0 | None | No examples available for this selection. |
| 2025-04 | 0 | None | No examples available for this selection. |
| 2025-05 | 0 | None | No examples available for this selection. |
| 2025-06 | 0 | None | No examples available for this selection. |
| 2025-07 | 0 | None | No examples available for this selection. |
| 2025-08 | 0 | None | No examples available for this selection. |
| 2025-09 | 0 | None | No examples available for this selection. |
| 2025-10 | 0 | None | No examples available for this selection. |
| 2025-11 | 0 | None | No examples available for this selection. |
| 2025-12 | 0 | None | No examples available for this selection. |
| 2026-01 | 0 | None | No examples available for this selection. |
| 2026-02 | 0 | None | No examples available for this selection. |
| 2026-03 | 0 | None | No examples available for this selection. |
| 2026-04 | 0 | None | No examples available for this selection. |
| 2026-05 | 0 | None | No examples available for this selection. |
| 2026-06 | 0 | None | No examples available for this selection. |
| 2026-07 | 0 | None | No examples available for this selection. |
| 2026-08 | 0 | None | No examples available for this selection. |
| 2026-09 | 0 | None | No examples available for this selection. |
| 2026-10 (partial) | 0 | None | 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.
2008: 0 complaints · 2012: 0 complaints
| Model year | Through age 0 | Through age 1 | Through age 2 |
|---|---|---|---|
| 2008 | 0 | 0 | 0 |
| 2012 | 0 | 0 | 0 |
Date coverage across each selected cohort
| Year | Incident dates used | Filing date fallbacks | Excluded dates |
|---|---|---|---|
| 2008 | 1 | 0 | 0 |
| 2012 | 1 | 0 | 0 |
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 | Electrical System |
|---|---|
| Electrical System | — |
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.
0 patterns with matching reports.
No narratives match the published patterns.