front pulley chatter

[Kdub]

Got some noise coming from my front pulley. Everytime it rolls over it gives a clunck. Any ideas what could be causing this? Mis aligned belt? Something internal? Looking for ideas before I jump into it. 08 k9 with 18k miles.

 

[liferider]

What do you mean every time you roll over it? Do you mean when you roll back on the throttle. Roll over a speed bump. Or roll off the throttle? The belt is continually rolling over the pully nonstop. Or is it at a certain part of the belt that makes noise. Check for a rock lodged in the belt

 

[Kdub]

I mean everytime the front drive pulley completes a revolution there is a clunk noise. Gonna rip into into it today and see if I can find anything.

 

[Atti2ude]

My Chopper does the same when rolling up or back. Seems as though the belt stretched just enough that the teeth don't line up causing a random clunk when it slips into place. While on the jack, I fed a paper towel between the belt and pulley while spinning the wheel and the clunking stopped. Adjusting rear wheel alignment doesn't make any difference but did notice if I overtighten the belt the clunk stops.

 

[Staffy]

something like this ...watch the video....if so look at my post tranny fixed...http://www.bigdogbiker.com/forums/help-wanted/37684-tranny-noise.html

 

[JeffM]

Ok so what wast the outcome.
Bearing?
Worn drive pulley?
Worn belt?
Transfer noise from Primary?
Squirrel mating in tranny?

 

[Atti2ude]

something like this ...watch the video....if so look at my post tranny fixed...http://www.bigdogbiker.com/forums/help-wanted/37684-tranny-noise.html

Thanks for the input. My clunk is more randomly spaced whereas yours occured about 3 times per revolution and close to the same spot each time. I'll give it another spin and listen for a pattern.

Did Andrew say what it was that caused the clunk?

 

[bigdogtech01]

Thanks for the input. My clunk is more randomly spaced whereas yours occured about 3 times per revolution and close to the same spot each time. I'll give it another spin and listen for a pattern.

Did Andrew say what it was that caused the clunk?

Yes, worn transmission bearings along with the drive pulley nut was loose and caused the inner splines of pulley to become worn out. Clunking noise is when pulley moves back and forth on the worn splines. The belt tension is a factor in the noise. With belt off, you will not notice it.

 

[JeffM]

Todd i still have that 3/4" drive to tighten the nut if it's loose.

Will be testing my for noise tomorrow.

 

[bigdogtech01]

Here is link to a post from a few weeks back...will add a picture to it soon of a worn pulley...http://www.bigdogbiker.com/forums/transmission-drive/48953-drive-pulley-please-note.html

 

[Atti2ude]

Here is link to a post from a few weeks back...will add a picture to it soon of a worn pulley...http://www.bigdogbiker.com/forums/transmission-drive/48953-drive-pulley-please-note.html

Thanks Andrew. Noticed my drive seal is leaking so will check everything out when I have it apart...just not sure when.