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Author Topic: Is my primary chain too tight?  (Read 401 times)


  • Scooter
  • **
  • Posts: 61
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Is my primary chain too tight?
« on: September 29, 2013, 07:10:23 am »
I think the previous owner of my Bullet has over-tightened the primary chain. When I poke a small screwdriver through the inspection hole I can't detect any slack in the chain whatsoever, even after rotating it around and checking different spots. It's probably run a thousand miles like this and I'm now worried that it may have damaged the gearbox bearings, perhaps. Should I continue to run it like this and just let it get slack from wear or should I take off the casing and check it out?

High On Octane

  • Grand Gearhead
  • *****
  • Posts: 5,779
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Re: Is my primary chain too tight?
« Reply #1 on: September 29, 2013, 09:45:59 am »
Pull the primary cover and adjust the chain to the proper tension.  Before you adjust it tho, slacken the chain quite a bit and grab the rotor and clutch basket and check for excessive slop/play in the bearing/bushings.  The proper tension of the chain should be 3/8" of vertical play at the tightest spot in the rotation.

Scottie J used to own bikes.  Now he just lurks around in the dark.