| Author |
Message |
    
Reepicheep
| | Posted on Friday, September 03, 2010 - 02:16 pm: | 
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If the concern is tension, why not just bore out the rear tensioner bolt hole slightly larger? Torque it down with the belt in place and it should give you a little more margin for tolerance stack, and does not add any additional moving parts (at least one Free Spirits tensioner has reportedly failed).
I never felt anything on my 9sx. But I can definitely feel the Uly "do something" when I am fully loaded and two up, and it does feel like it its belt related. That being said, I can't say it is harmful or anything, just that something is happening on my XB12 that never happened on my XB9.
I love belts for street bikes. 30k miles on my M2, 30k miles on a 9sx, and no belt failures (no doubt helped by Murphy and the fact that I had a spare 9sx belt on the wall the whole time). |
Eulysses
| | Posted on Friday, September 03, 2010 - 05:21 pm: |
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Or a smaller pulley Reepi. The tension at park and unloaded may be perfect...it is the bottom of compression that is too tight. So a smaller pulley may not be the answer but WHERE the pulley contacts the belt. Euly |
Nobuell
| | Posted on Saturday, September 04, 2010 - 01:16 pm: |
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Reepicheep,
I could not find much information regarding belt tension from Goodyear. Gates has a very good manual on belt tension for their Polychain belts that are similar to the stock belt.
Using the Gates data, a new belt tension should be 108 to 118 lbs for .375" deflection (top center pushing down). A used belt should be 78 to 88 lbs for the same deflection.
When I changed my last belt, the tension was way over the new value. I slotted the pulley bracket mount to achieve the above tension. Since then, I have not experienced the two-up tight belt sensation previously referenced.
I believe the pulley arrangement to be a sound design. I believe the problem is a stack up of tolerances and variables regarding swing arm length, motor location and belt length that may over tension the belt.
After a few thousand miles of operation, the belt tension is within the correct tension range for a used belt. |
Skinstains
| | Posted on Saturday, September 04, 2010 - 02:20 pm: |
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Give me chains with auto oilers or give me death ! Rubberbands are for offices and paperwork. |
Teeps
| | Posted on Saturday, September 04, 2010 - 03:11 pm: |
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IMO chain maintenance far out weighs (negatively) the relative risk of belt failure, given the belt is maintenance free.
I'd no sooner change the Buell belt for a chain, than I would buy a Blood Hound, and have him debarked. |
Natexlh1000
| | Posted on Sunday, September 05, 2010 - 10:24 am: |
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Bloodhounds have skin, not bark. |
Growl
| | Posted on Sunday, September 05, 2010 - 03:03 pm: |
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My belt at 25,000+ miles broke yesterday while riding 2 up on rough terrain, exactly when the suspension was getting a full workout... thinking of chain conversion now. |
Skinstains
| | Posted on Sunday, September 05, 2010 - 10:55 pm: |
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There's a reason all the serious dirt and performance bikes come with chains. Belts are for fat doods to use in liue of suspenders.
Give me chains with auto oilers or give me death ! |
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