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Classic, Vintage & Veteran For Coventry and Meriden Models. Anything pre-Hinckley goes.

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Old 09-07-2009, 12:46 PM   #1 (permalink)
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Belt Drive Primary Benefits

I am going to do a rebuild on my transmission over the winter and am considering doing a belt drive primary conversion at the same time. Is this conversion worth the expense? Will this reduce vibes to any degree? I like the weight reduction benefits, but truth be told, I am not thrilled about the expense and am not looking for every last ounce of weight savings. Curious what others who have done this (or not) think of the benefits.

Ken
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Old 09-07-2009, 03:06 PM   #2 (permalink)
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Can't see the point, I would spend the money on having your crank dynamically balanced, then the vibes will fine.
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Old 09-07-2009, 03:25 PM   #3 (permalink)
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I'm with TBS.
The belt will probly live longer than a chain. But unless your drag racing
and trying to shave off .0000010 seconds. then save that cash and
buy your bike some Bling
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Old 09-07-2009, 03:51 PM   #4 (permalink)
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Sorry to dissagree guys and I do think what you have suggested is VERY worth while..... but in conjunction with dynamically balancing the crank why not have a clutch that ACTUALLY WORKS? The cost of stock replacement parts is about the same as a new belt system!

If you buy a QPD system or another with a diaphragm spring which completely replaces the stock items, including the shock absorber, you will get a clutch with the following benefits; Runs dry, does not slip or drag, frees off instantly, gets lighter at the lever when operated, saves weight, reduces secondary out of balance vibration and has a larger sealed bearing centrally positioned below the belt. Use this in conjunction with an 8mm Gates belt and you can forget the primary. IF and it's a big IF, the belt does break, it will not wreck the cases, unlike a duplex chain can.

DO NOT waste your money on a Hayward system. They are cheap admitedly but use the BAD items from the stock clutch (rollers and shock absorber) and the 10mm synchroflex belt he uses was NOT designed to run in oil. I cannot comment on the quality of materials or workmanship because I don't know. However the other statements are FACT.

Oh, and then if you want in the future, you can put an electric start on the back of the clutch basket........... but let's not go there just yet.

Ken, can I suggest you do a search because there have been quite a few threads on this forum regarding the same questions as you have posted.

Roy.
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