2005 Yamaha Yp400 problems, complaints & recalls
Most-reported problem areas: Engine And Engine Cooling (2) · Engine And Engine Cooling:engine (1) · Engine (1)
Safety recalls (0)
No recalls on record for this model year (campaigns announced since 2010).
Service bulletins (1)
Technical service bulletins are repair instructions manufacturers send dealers for known issues. Unlike recalls, the fix is not automatically free — but naming the bulletin at the service desk can save diagnosis time and support goodwill repairs.
Engine And Engine Cooling:engine 2007-06-21 · 2007012 · Service Bulletin/Repair Instructions
coupler corrosion makes engine difficult to start. *kb
What owners report
2013-12-18 · Engine · 9,600 mi“once 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 v…”
2010-04-26 · Electrical System · 4,500 mi“engine stalling while moving. *tr…”
2008-04-10 · Electrical System:software · 320 mi“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. *tr…”
2008-04-07 · Engine And Engine Cooling · 3,000 mi“vehicle stalls when attempting to accelerate normally (typically stalls in intersection). not frequent. vehicle restarts normally. occurs when engine is fully warmed up. *tr…”
2007-08-28 · Engine And Engine Cooling:engine · 12,100 mi“2005 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 rid…”
Excerpts of consumer complaints filed with NHTSA, lightly truncated. They are owner statements, not verified findings.