2015–2018 Yamaha SR400 Recall: Engine oil line flare nut may be insufficiently tightened, allowing oil to…
NHTSA campaign 18V730000 · Engine and Engine Cooling · filed Oct 16, 2018 · verified Jul 30, 2026
The defect
Yamaha Motor Corporation, USA (Yamaha) is recalling certain 2015-2018 Yamaha SR400 motorcycles. The engine oil line flare nut may be insufficiently tightened, allowing oil to leak onto the rear tire.
The risk
An oil leak onto the rear tire can cause a loss of control, increasing the risk of a crash.
Check whether your specific vehicle is affected
Recall campaigns often cover only certain VIN ranges. Enter your VIN on the official NHTSA site to confirm whether your vehicle is included and whether the repair is still open.
Check VIN on NHTSA →The fix — what to do
Yamaha will notify owners, and dealers will inspect the flare nut connection. If oil is not leaking, the nut will be tightened. If oil is leaking, the engine oil line will be replaced and the flare nut will be tightened, free of charge. The recall began October 31, 2018. Owners may contact Yamaha customer service at 1-800-962-7926.
Owners may also contact the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1-888-327-4236 (TTY 1-800-424-9153), or go to www.safercar.gov.
Affected vehicles
Related recalls
Other campaigns involving Yamaha vehicles
Source: NHTSA recall database, campaign 18V730000. Data last verified Jul 30, 2026.