NHTSA (USA)Critical
At a glance
What can fail
The nut securing the primary sheave can loosen and detach from the scooter's transmission system.
What the fix does
Dealers replace the primary retaining nut and washer with a redesigned version that prevents loosening.
4,262 vehicles affected
NHTSA Campaign #21V251000 — full official notice →Summarized — see the official notice for exact wording, dates, and contacts.