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Sportster Motorcycle Transmission, Clutch, Primary & Secondary Drive Transmission, Clutch and primary or secondary drive problems, advice, and/or how tos.

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View Poll Results: Have you broken a drive belt (secondary drive) on your Sportster Motorcycle
Yes 327 29.51%
No 781 70.49%
Voters: 1108. You may not vote on this poll

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  #21  
Old 14th October 2005
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broke one...... second gear change down the drag strip about 40,000klms

second one over 40,000 klms and still looked fine when I saold it to a mate as a spare....

am going kicking and screaming to a 520 chain kit as I need to be able to ride over 2000klms, race and then ride back home....

if I was running local then I'd be keeping the belt...


another point mentioned..... don't have 'em too tight...for 2 reasons...

one...it loads it up too much

two... it alows the rocks to be spat out instead of thru the belt
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  #22  
Old 14th October 2005
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From the results so far it is not looking too good for the belts. Come on everyoen lets get some more votes in here.
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  #23  
Old 14th October 2005
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Lets put things in perspective............

how many chains and sprockets would have been used in that time frame????


.....never mind chain lube everywhere
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  #24  
Old 14th October 2005
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I didn't vote because while I've had to replace a belt, I didn't actually break one. Caught a rock but stayed together for sometime and never did come completely apart. But it did ruin it and required replacement.
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  #25  
Old 14th October 2005
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Havent broke one yet, we got some hp on our rides too, but I agree that the belt should be set on the loose side of spec. Better a bit too loose than a bit too tight.
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  #26  
Old 14th October 2005
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11,000 on mine and still looks new. I see the MoCo has come out with a new uberbelt this year for all models. Supposed to be even better. More tolerant of foreign objects.
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  #27  
Old 18th October 2005
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I just had 1 break last week,25410 miles on it.. I run about 4 or 5 miles gravel everyday and know of a couple of rocks have made it in.. Had to push it 1/2 mile on gravel that sucked... 175.00 plus tax and about 2 hours to install.
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  #28  
Old 21st October 2005
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05 1200 R 82 HP......broke mine at about 2500 miles...........5K now and no problem....I'm also running slightly looser now.
Dealer said belt was defective.
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  #29  
Old 21st October 2005
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In my 7 1/2 years working at a dealership, I have only seen 2 Sportsters and 1 Buell break belts, and the Buell had a stone hole in it. Back in '02, we had a bunch of touring bikes towed in with broken belts. The motor company blamed it on a factory worker who was twisting or "backbending" them too much. I was in a Buell school in Milwaukee for the (then) new Firebolt models. They use an idler pully on the drive belt, and we noticed the bikes in class had a very small diameter idler pully. The instructor explaned that these were pre-production units and they were having problems with belts breaking. The production units have a much larger diameter idler pully, so there is less backbending. In the old days, belts were packaged in a small box, all coiled up. Not anymore, now they come in a big box, packed in a large oval, nice and comfortable. It is very important not to twist or sharply bend belts when installing them!
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  #30  
Old 21st October 2005
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Strange that many of the belts, from what I read, are happening soon after a dealer mechanic has worked on the bike.

Looks like the MoCo should emphasize care fo the belt when the mechs are working on the rear end.

I wish all MoCo mechs were as knowledgable as you Liam.
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