New open belt noise: belt too tight?

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Jul 23, 2024 | 03:48 PM

#21

TwiZted Biker

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Joined: Mar 2009

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From: Niles Canyon Ca.

I'm hearing the usual mechanical hum that comes with that clutch setup when new, it will get louder and turn into a rattle as you get some miles in it and the edges on the plates wear in against the dogs. Belts going to settle out with some use, they are always tight at first. Take several hops around town, don't get frisky or heavy highway checking things often, go from there.

Jul 23, 2024 | 04:41 PM

#22

Max Headflow

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Joined: Dec 2005

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From: poway

Quote:

Originally Posted by Jackie Paper

How would you change the alignment? Or actually make a any adjustments for tension on a TC setup?

About all you have is spacing the front pulley on a TC. If you can get the front pulley on, the tension is not too tight..

Jul 23, 2024 | 05:59 PM

#23

98hotrodfatboy

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Joined: Mar 2010

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From: Poolville

Alignment is critical.. need to make sure the outer edge of each pulley is the same distance from the motor plate.. Tension is not adjustable.. Motor plate is fixed..

Jul 25, 2024 | 03:03 AM

#24

nghieplk

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Joined: Sep 2017

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From: VietNam

Quote:

Originally Posted by Max Headflow

If the belt is so wide that there isn't clearance on at least one side, that may be the source of your noise.. If you want to check alignment should be able to place a straight edge across the outside edge of the pulleys. They should be flat..

I suspect the belt is too wide for the pulley and you may want to refer to the instructions or contact ultima.

I took some pictures. Its the 2” belt kit come all together

Jan 28, 2025 | 07:47 AM

#25

nghieplk

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From: VietNam

Update: After some trips arround the country, the noise is still there.
Do a quick research there are 2 over teeth belt that I think it could work:
1. BDL-141: 141T (over 1T) 8mm but only 1 3/4” width (compare with the stock Ultima 2”).
2. BDL-142-2: 142T (over 2T) 8mm 2” width.
I think I should give the second option a try. Just wonder over 2 teeth is normal or too much loose? (The current Ultima 140T is tight as f***)

Jan 28, 2025 | 09:49 AM

#26

Architect

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Joined: Apr 2010

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From: Long Island, New York

I have the same setup on my 1997 Dyna, it does NOT make that sound. As stated tension is not adjustable, alignment can be checked but again not really adjustable.

I bought mine from Jireh Cycles, I would call them and Ultima for advice.

PS after 10 years I had to change the clutch hub bearing, the belt got slack, but still did not make a noise like that.

Jan 28, 2025 | 10:32 AM

#27

98hotrodfatboy

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From: Poolville

I would think that going oversized on the belt, even 1 tooth will give too much slack/looseness in the belt. To check pulley alignment, you would have to remove the front pulley cover and the rear pressure plate assembly to get an accurate measurement from the face of each pulley (they should match front to rear and rear to front). Also, can you post a video of you checking the belt tension. How much can you move the belt when pressing down on it with 10 lbs. of pressure.? Is it less than a 1/4"?

Jan 28, 2025 | 08:44 PM

#28

John CC

HDF Community Team

Joined: Aug 2018

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From: New Hampsha

Think about it; if you add two teeth to the belt it's the same as moving the two pulleys closer together the distance of one tooth, i.e. 8mm. a significant distance. (Adding one tooth would be the same as a 4mm change.)