HarleyTechTalk

I have been working on my own compensator design. have you noted that belt drives don't use any kind of compensator no need the belt takes up the shock...top fuel Harleys use belts.  the old Harley Sturgis belt primary used rubber blocks like import bikes use in the rear wheel. i found that the ramp and spring only absorbs so much shock. 2 steel ramps with spring tension only takes so much shock based on the spring and wears. I have a prototype on my shovelhead and have applied for a patent. it is smooth won't wear all you need is new rubber blocks every 100'000 mi there not rubber but something 10 times better not effected by oil. we did testing to see how much load a factory unit could absorb and how many cycles before they would wear out not that many metal on metal has  poor wear factor. my impact drive has no wear at all. after many many miles all you do is replace the insurts. remove the outer 3 bolts pull out the old ones and replace the new ones.

I doubt a belt absorbs much if any more shock than a chain.  Top-fuel bikes aren't ridden on the street.  The touring bikes have been using rubber inserts in the rear sprocket since '08 and the v-rods since, I don't know, but before that anyway.

I'm pretty sure there has been at least one other rubber-loaded primary comp design for a fair amount of time now.

All that being said, good luck.  I hope it works out well for you.

I hope it works better than the new design BDL springless comps work.  I chewed up the first generation in under 2k.

Had a old triumph about 30 years ago . I believe it had rubber in compensator or clutch basket.Its been so long ago ,can't remember.They did it for years.

Quote from: dr evo1 on June 07, 2015, 02:55:09 PM
I have been working on my own compensator design. have you noted that belt drives don't use any kind of compensator no need the belt takes up the shock

I can tell you from experience that's not true.  There's no stretch in those belts to absorb anything so you feel every power stroke.

Belts don't absorb anything or stretch which is a good thing It would be a bitch to hold the pitch if it was constantly changing distances between cogs and not lining up. As for absorbing shock, I've seen several broken cranks in automotive aircraft engine conversions. It's a pretty rigid connection from prop to crank through the reduction drive with belts. Subaru conversions would snap a crank like clockwork in the 500 hour mark back when I was playing with GyroCopters. All Rotax aircraft purpose built engines use a compensator version in the gear drive reduction. No crank failures with that setup.
Ron

well I wonder if that's why twin cams have such a problem with comp set ups. must be all that raw horsepower. or planed failing so you have to spend more money. funny how they come out with a fix for things screaming beagle.