Service bulletin M2020-006
A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.
| Type | Service bulletin |
|---|---|
| NHTSA id | 10176884 |
| Published by NHTSA | 2020-07-02 |
| Manufacturer's number | M2020-006 |
| Manufacturer's date | 2020-06-30 |
| NHTSA component | ENGINE AND ENGINE COOLING; FUEL SYSTEM, GASOLINE; EQUIPMENT |
NHTSA's summary
Certain 2020 YZ250FX Models - Rich Running Condition - ECU Reprogramming Some units may experience a condition where the engine is hard to start due to a fouled spark plug. The 2020 YZ250FX’s ignition timing and air/fuel ratio were set to meet this model’s target of good low speed torque for off-road closed-course competition. When riding in certain conditions, the slightly retarded ignition timing and richer air/fuel mixture may lead to the spark plug fouling, causing a hard-starting condition. To remedy this condition, Yamaha has revised the ECU programming to address the rich running condition.
The document
The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.
Components
Engine, Equipment and accessories, Fuel system
| YAMAHA YZ250FX | 2020 |
|---|
Listing a model year does not mean every vehicle of it is concerned: the document says which.