Yamaha Motor Corporation, USA is recalling 4,262 model year 2015-2020 Yamaha XC155 scooters.
The primary sheave nut may loosen and fall off.
A missing primary sheave nut may cause a stall, without the ability to restart the engine, increasing the risk of a crash.
What to do
Yamaha will notify owners, and dealers will install a primary retaining nut and washer free of charge.
Owners are advised not to ride their scooter until the remedy has been preformed.
Owners may contact Yamaha customer service at (800) 962-7926. Yamaha's number for this recall is 990145.