Yamaha YP400 Problems by Model Year
NHTSA recorded 6 consumer complaints across the 1 model years of the Yamaha YP400 (2005–2005) that have at least 5 complaints. 2005 has the most, with 6. Across all years, the part named most often is engine cooling (3 mentions). Pick a model year below to see its parts, mileage, recalls and service bulletins.
All YP400 model years
Years with fewer than 5 complaints are not listed. The score compares years of the same model, allowing for the era and for how long each year has collected complaints: 50 is a typical year, lower means fewer complaints. It is not adjusted for sales volume.
| Year | Complaints | Median mi | Recalls | TSBs | Score (50 = typical) | Trend |
|---|---|---|---|---|---|---|
| 2005 | 6 | 7,050 | 2 | 1 | — | Not enough data |
Parts named most often, all years
Counts add up complaint mentions across the listed years. A complaint can name several parts.
- Engine cooling3 50%
- Electrical system2 33%
- Engine1 17%
Example complaints
One per model year, chosen for length and detail. Personal details are removed. They are consumer reports, not findings.
2005: “I 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.”
NHTSA complaint #10224148, filed 2008-04, 320 milesOther Yamaha models
310 complaintsYamaha Yamaha
173 complaintsYamaha YZFR1
156 complaintsYamaha FJR1300
122 complaintsYamaha Road Star Warrior
117 complaintsYamaha Bolt
82 complaintsYamaha Road Star Silverado
74 complaintsYamaha XV1700
56 complaints
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 28, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate. Methodology