Belt slipping

pknowles · Jun 5, 2017

You need to really look at the wear on both parts. It shouldn't be slipping. That wears the hell out of the parts. Can you post a picture

bigkelk9 · Jun 5, 2017

Rick Utley said:
I certainly can and will when I get home and will greatly appreciate any help on this matter I can get really frustrated...

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Something tells me ur pulley on one side or the other is wore (gear or pulley).. ur belt will be next.. I'd take it off and do a close inspection on them teeth

BWG56 · Jun 5, 2017

Rick Utley said:
Good evening, I have an 04 Big Dog Chopper 117cu in. When I really twist the throttle hard especially two up my belt slips on my rear sprocket has anyone else had this issue? Belt and pulley have some wear but not that bad. Belt is tightened to specs maybe a little more. Any suggestions? Thanks...

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When you say spec, how much deflection is it now?

PROFLYER · Jun 5, 2017

You sure it's the belt and not the clutch?

BWG56 · Jun 5, 2017

I can only get about 1/8 twist on my 07' however this is what the 07' manual states

pknowles · Jun 5, 2017

They make a tension gauge to measure the deflection. I bought one a while back and it takes a bit getting used to it.

shansel88 · Jun 5, 2017

Ive gone through this very thing. Tighten the belt and be done wit it. I replace front pulley and rear and belt. In the end - nothing worked - under heavy acceleration the belt slipped. So I found the choices to be: lay off the throttle, tighten the hell out of the belt, or find a balance between the two.

BWG56 · Jun 5, 2017

Rick Utley said:
So tell me what is right at the point of being to tight without a gauge by twisting the belt. 1/8 ???

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That's what I would think, and it should be on the ground, not up on a jack cause the tension is different with the weight of the bike on the back tire. Assuming the pulley teeth are in good shape, some one on here had shown one not to long ago that the pulley teeth were sharp from wear

Maybe you need a new belt if that's the original

pknowles · Jun 5, 2017

BWG56 said:
That's what I would think, and it should be on the ground, not up on a jack cause the tension is different with the weight of the bike on the back tire. Assuming the pulley teeth are in good shape, some one on here had shown one not to long ago that the pulley teeth were sharp from wear

Maybe you need a new belt if that's the original

I posted a picture of my wife's Heritage rear pulley that were worn in half and all the teeth on the belt were cut loose on the load side.

PROFLYER · Jun 5, 2017

Rick Utley said:
Mech just pulled clutch out and side it was ok throw out bearing was shot so replaced it

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Didn't answer my specific question: are you SURE the belt is slipping and NOT the clutch?

Lots of guys have had issues with the clutch slipping and 99% of the time it's because someone put synthetic fluid in the primary because everyone thinks if it's synthetic, it has to be better. That WILL make a clutch slip in these bikes. Plain old Harley primary oil is all you should use. NON synthetic.

Belt slipping

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