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Hi - A fellow Brit here, and my second post in 23 years of Dyna ownership.
I have had almost exactly the same experience.
Snapped a belt on my 2000 FXD at 50k and thought I would treat the old girl to a a set of pulleys at the same time.
I bought a DOSS afer marker 'Hard anodised' one and after 6 or 7 k my belt started chirping (particularly when under load).
Bottom line the rear pulley has wear on both flanks of the teeth, but also the top of the tooth has been 'squared off' the combination rsults in a knife edge - this I feel is a bad thing?
I have always paid attention to belt tension (setting it up with no shocks fitted and winging arm piviot directly between the pulley centres to 1/4" deflecion with 10lb load) and my rear wheel is straight according to the drilled holes in the swinging arm relative to the rear axel. But I will admit it got a little loose (1/2" deflection) just before the chirping got bad.
What I took for granted was that the new pulley had the same offset as the original. When I look at the wear pattern on the pulley the belt has been rubbing against the left (outside) wall of rear pulley but the inner edge is untouched.
The belt runs up against the flange on the left (outside) side of the front pulley - I believe that is the design intent.
I am biting the bullet and paying the Ł400 ish for an HD orginal pully and will pay a lot of attention to the alignment.
pictures attached.
Any further wizdom on this subject would be much appreciated - especially a diagnosis of my pulley wear pattern.
Last edited by Scumbidoodlerous; Jun 18, 2023 at 06:10 AM.
When the bike rolls forward, the belt should run center of the pulley. Backing up, it walks to the inside flange
If your belt currently runs to the outside going forward, and the alignment is correct, spacers are available to compensate for any offset required.
An OEM pulley works but is not the only solution ($$$)
Thanks Stiggy - it sounds liek you know what you are talking about.
So to round up this matter - and maybe even spread a little wisdom (or get told I am wrong
I put a new HD pulley on ...yep loads of $$$ (well ŁŁŁ here)I fussed about with the bent wire and the holes in the swinging arm method of alignment for a while then the penny dropped! All I had to do was spin the wheel forward and tweak the axel adjusters till the belt tracked in the centre of the pulley.
The bike feels better than ever now, gone are the odd squeaks and patches of vibration at various revs. On reflection this method seems like a no brainer, but I have never heard anyone mention it?
Last edited by Scumbidoodlerous; Jun 29, 2023 at 02:35 AM.
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