Yamaha Smax: Engine

Affects Yamaha Smax · 2015–2020 — about 616 vehicles.

The hazard

Issue: On certain scooters, the primary sheave nut in the clutch could loosen and fall off over time. If this happens, the engine could stall and you may not be able to restart it. Note: You may notice abnormal engine noises if the primary sheave nut comes loose. Safety Risk: A sudden loss of engine power could increase the risk of a crash. Corrective Actions: Yamaha will notify owners by mail and instruct you to take your scooter to a dealer to replace the primary sheave nut and washer.

What to do

Contact your dealer; the remedy details were not included in the filing.

Critical — crash/injury risk now High — injury risk; see remedy Moderate — fix at next service Low — minor / informational