2015–2020 Yamaha XC155 Recall: Primary sheave nut may loosen and fall off
NHTSA campaign 21V251000 · Engine · filed Apr 9, 2021 · verified Jul 30, 2026
The defect
Yamaha Motor Corporation, USA (Yamaha) is recalling certain 2015-2020 Yamaha XC155 scooters. The primary sheave nut may loosen and fall off.
The risk
A missing primary sheave nut may cause a stall, without the ability to restart the engine, 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
Owners are advised not to ride their scooter until the remedy has been preformed. Yamaha will notify owners, and dealers will replace the primary retaining nut and washer with one of a new design, free of charge. Owner notification letters were mailed on April 28, 2021. Owners may contact Yamaha's customer service at 1-800-962-7926. Yamaha's number for this recall is 990145.
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
More Yamaha XC155 recalls
Other campaigns involving Yamaha vehicles
Source: NHTSA recall database, campaign 21V251000 (manufacturer number 990145). Data last verified Jul 30, 2026.