I've never had an issue with my chain falling off until today. I put my bike in the bike holder in front of the drivers window. Perhaps something got knocked or moved?
I could have a dirty cassette or old chain but it seems strange to go from zero issues to not being able to keep chain on.
My chain falls off only when I stop pedaling... When I look down at the crank, when I stop pedaling, it spins faster and faster until the chain falls off. Ideas?
I have an e bike with bottom bracket motor bafang bbs02.