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belt noise

Started by vern, June 20, 2022, 10:25:54 AM

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vern

I have a howl or whine when I gear down, and had this thought that the belt might be rubbing on my rear tire, by moving from side to side asI gear down? has anyone had an unusual noise like this?

Hossamania

Check your belt tension. Look for witness rub marks on the tire and on the belt guard. Check the condition of your pulleys. Check your primary chain adjustment.
How many miles on the belt and pulleys? Does it stop if you pull the clutch in?
We learn from history that we do not learn from history

Tacocaster

Worse case? It's your Transmission Mainshaft Bearing if it's a BT.  :emoGroan: Ugh!

Fingers crossed that it's your belt rubbing!
We're all A-holes. It's to what degree that makes us different.

vern

Humm,,,,,, it does stop when I pull the clutch in.

03rg

Any recent changes? Like a tire replacement?  My first guess would be a drive belt that is to tight.

Fugawee

Back in the early 2000's a Buddy of Mine had a 95' FLHTC.  He took it to a Local Indy for some "mods" and had the Belt and Tranny Pulley replaced while there.  After a couple of years, the Bike would "chirp" on a Downshift, and occasionally on an Upshift.  Drove Him nuts.  Constantly checked the Belt for alignment/tension and all that.  Checked all kinds of things.  Still chirped.  He and I finally had enough and took it all apart.  Unknown to Him the Indy replaced the Tran Pulley with an Aluminum one when He worked on it.  A Steel Pulley had been on there.  Just normal riding the Belt picked up road sand, and what-not.  The outer third of the Pulley towards the lip...the teeth on the Pulley had been worn down and were much "sharper" than they should be.  The inner 2/3 of the Pulley was OK, considering.  The road grime/sand acted just like emery cloth and ground down that section when the Belt would go around with the sand, etc. on it.  That caused His Belt to really not ride properly on the Pulley, and actually started wearing that section of the Belt down.  We replaced the Tran Pulley with a Steel one and replaced the Belt as well.  No problems ever since that ordeal, and He still has that Bike.
Prior to Us repairing it, He took it back to the Indy and bitched.  The Indy "fixed" it right on the spot.  He got a tube of HD "Poly-oil" and smeared it all around the Belt.  I don't know if Poly-oil is still available from HD.  Not that I'd use it.  It was a clear grease like a tube of toothpaste.  No chirp for about a day, and then it was back.  I think the Poly-oil was more of a bad move than a help.  The Poly-oil on the Belt and Pulley contained more road grime/sand on the Belt.  The chirp got worse after that "repair".
For what it's worth...that Indy went out of Business after a few years.  He moved Out of State and got a new job.

fbn ent

June 22, 2022, 03:39:42 PM #6 Last Edit: June 22, 2022, 03:58:20 PM by fbn ent Reason: more info
I believe that Poly Oil was made for use on the primary belt on a Sturgis model.

I put an aluminum front pulley on my wife's Sportster a few years back. Made it 3000 miles or less (Sturgis and back). The well known pulley source said, "We stated it was lighter, not that it would last."  :angry:
'02 FLTRI - 103" / '84 FLH - 88"<br />Hinton, Alberta

Ohio HD

Quote from: fbn ent on June 22, 2022, 03:39:42 PMI believe that Poly Oil was made for use on the primary belt on a Sturgis model.



  :up:    It was. I still have a tube.
For your bike part needs, call Calif Phil   www.harleypartscheap.com

xlfan

Quote from: Ohio HD on June 22, 2022, 07:21:36 PM
Quote from: fbn ent on June 22, 2022, 03:39:42 PMI believe that Poly Oil was made for use on the primary belt on a Sturgis model.




  :up:    It was. I still have a tube.

Wasn't the poly oil actually meant for use on the rubber cushion "compensator" on the primary belt drive models?

Ohio HD

Quote from: xlfan on June 22, 2022, 10:53:19 PM
Quote from: Ohio HD on June 22, 2022, 07:21:36 PM
Quote from: fbn ent on June 22, 2022, 03:39:42 PMI believe that Poly Oil was made for use on the primary belt on a Sturgis model.




  :up:    It was. I still have a tube.

Wasn't the poly oil actually meant for use on the rubber cushion "compensator" on the primary belt drive models?

It was, to help reduce wear and stop squeaks. It was also used to reduce wear on the belt as well. Used to brush it into the parts with an old tooth brush.
For your bike part needs, call Calif Phil   www.harleypartscheap.com

guido4198

A long time ago...PolyOil was specified by the Motor Company as a belt dressing. No longer available.
A local dealer told me it was superseded by Harley "Assembly Lube". Make of that what you will.

kd

I recall a fellow that was washing his Softail bike daily and he had a similar squeak. It disappeared with a light shot of WD40 so we determined it was squeaky clean.  To confirm it is in fact the belt you could try the same thing or take a candle and rub wax liberally throughout the belt and rear pulley teeth.  I keep a candle in my tool box and used it often to stop a belt growl or squeak with great success.  The wax imbeds and doesn't gather road grime.
KD

Ohio HD

One thing I've done to try and stop belt squeak was to take a bar of soap (fresh bar, not one softened by water), and run it across the edge of the belt that's running against the pully. I've had some stop squeaking forever, and others you had to apply soap again. Actually most the time is just went away after the first time applying to the belts edge.
For your bike part needs, call Calif Phil   www.harleypartscheap.com

xlfan

I have had luck with roughening up a bit the edge of the belt that is running against the pulley with some emery cloth, when squeaking that edge is kind of hard and "polished".

fbn ent

vernyou didn't mention the model. Are you sure the wheel are aligned properly?
'02 FLTRI - 103" / '84 FLH - 88"<br />Hinton, Alberta