When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Primary/Transmission/Driveline/ClutchFind answers to general powertrain, primary and transmission. Have clutch issues and need suggestions? Post them here.
What can cause a belt to break? I have an 02 trike with a Lehman trike kit. I have just broken my second belt with only 30,000 miles on it. Second belt only lasted a year or so, maybe 5k miles. I don't see anything wrong with the pully or sprocket. It has a clean break, no sign of wear as I can tell.
Just wondering if anything I can do. Not a fun project. I do my own wrenching with the advice from a friend who is a harley guru and retired from running his own shop.
A belt that is too loose will jump and break prematurely. A loose belt will also vibrate excessively and experience tensile failure.
Another sure to break it is someone not removing everything and trying to bend or twist it through to get it installed. On a conventional bike it's typically when someone tries to bend it through the swingarm rather than removing the swingarm.
Back bending the belt causes clean breaks, there are specific circumferences not to exceed when bending belts.
Last edited by Ed Ramberger; May 7, 2020 at 09:49 PM.
I have broken 2 belts within 1000 miles and determined the tension was too loose. I now set tension to 1/4"@10lbs with rider sitting on the bike.. I have a very built motor..
7 Surprising Harley-Davidson Products that Are Not Motorcycles
Slideshow: The bar-and-shield logo shows up on far more than motorcycles, some of the company's most unexpected products have nothing to do with riding.
Slideshow: From the troubled AMF years to modern misfires, these bikes earned reputations for reliability issues, questionable engineering, or disappointing performance.
Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?
Slideshow: The Swiss custom shop has taken a Harley Softail and stretched it into something so long and low that it looks closer to a rolling sculpture than a conventional motorcycle.
Engraved Rebellion: Inside Bundnerbike's Glam Rock II
Slideshow: A standard cruiser becomes an intricate metal canvas in the hands of a Swiss custom house known for pushing Harley-Davidson platforms far beyond their factory brief.
Slideshow: Harley-Davidson's challenges aren't abstract; they show up in dropping shipments, shrinking dealer traffic, and strategic decisions that aren't yet translating into growth.