Chain Keeps Jumping Off the Motor

Discussion in 'Motorized Bicycle Trouble Shooting' started by Hannibelle, Nov 19, 2016.

  1. Hannibelle

    Hannibelle New Member

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    This is my first electric bike build. I used a 24v Razor scooter motor and custom sprocket. The motor chain keeps jumps off, especially when on full power. There is a little bit of slack in chain by half a chain link. How can I fix this?
     
  2. Seabass

    Seabass New Member

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    Cut a link out and get a half link. Or move everything so it will be tighter.
     
  3. crassius

    crassius Active Member

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    or add a chain tensioner
     
  4. 2door

    2door Moderator
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    Chain tension probably isn't the issue but sprocket alignment is. Unless the drive and driven sprockets are perfectly aligned you're going to have chain problems. A very loose chain can be a problem but alignment is usually the culprit.

    Also a chain that is too tight can also give you problems. Roller chain requires some slack, usually about a half inch is good.

    Tom
     

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