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not just more power it transfers power better to the tire... one of the guys that races super cross broke it down one night to me after a case of beer, ill be honest i stopped listening after a while but he was very detailed and i have yet to find any info that says he was wrong...
Actually, there is a belt repair kit available. The belt is spliced together. it's temporary but it will get you back on the road.
I don't know about the chain being able to handle more power. I haven't done any testing on that or seen any documentation. The polychain, which is what the name of the belt on our bikes is very, very strong & quite reliable. I manage a plant uses uses a ton of machinery. It's a very corrosive environment & we use stainless chain to drive a lot of our conveyors. The stainless stretches, kinks, wears out quite quickly & is very noisy. I'm in the process of switching everything over to polychain. I've only done a few pieces, but so far it's much quieter & the attention needed to keep it running is at a minimum.
So people just like the idea of a chain on their bike. My uncle owns a custom bike shop. He built his personal daily driver. The front is a '75 FXE/Shovelhead frame & the back is an '85 Softail frame. The flex in the Softail causes the chain wear out quickly, which is why HD went to a belt on the Softail. He made an auto chain tensioner out of a skateboard wheel & swears by the chain. He's ridden that bike all over the country in past 15 years & would never dream of switching to a belt. Different strokes for different folks.
I got the chain handling more power thing from a buddy that works at a Suzuki / Kawasaki dealer. He told me that on their bikes 100 HP is about were they switch. Bikes with less come with belts, bikes with more come with chains.
Only reason I can think of is that the belt *might* jump a tooth sooner than a chain... but it's not for lack of tensile strength. I would also think it's a torque thing and not a HP thing.
I'll admit the chain looks pretty cool but the biggest I'm planning on going is a SE 103 with cams so I don't think I would need it. I'd rather save money on replacing chains by using a belt and get some more stuff powder coated so I can keep blacking out my bike.
The Yamaha Raider and Warrior are both high HP bikes and have belts.A mild big bore kit will not overstress the drive belt on a HD. It will shorten replacement intervals though. I will replace mine every 20k miles once I go big bore rather than 40k miles that I will currently replace at with a stock engine.
Only reason I can think of is that the belt *might* jump a tooth sooner than a chain... but it's not for lack of tensile strength. I would also think it's a torque thing and not a HP thing.
I'd bet ya nailed it. Look at crotch rockets, all chain drive. A shaft would hold up, but think of the extra mass, as well as maintenance to keep it balanced, especially @ 100 mph plus.... They use banding in the making of the belts that can withstand gobs of torque and HP, (we use them on some servo's @ work) with the limiting factor being the contact surface of the ribs of the belts compared to chain and sprocket.
Personally, I love the belt from a maintenace standpoint. One less think to think about while out enjoying the weather.
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