I tried using the 330 series Comet and found the minimum engagement lost some 600 or so rpm. The belt-TC was rated for too little power as well but I was not ready to sink the bucks needed for the 500 series and the heavier belt. You need the heaviest weights and disengage the springs to get it to engage the belt at near zero rpm. Keep in mind the comet is meant to rotate CCW and was meant to drive a left side chain. When I was using the comet I ran my motor CCW, not the preferred rotation of a PMG-132.
The only part of the Comet setup I am using is the motor jack shaft mounting plate which I modified to mount the the motor facing the right and running a second chain to the jackshaft. I agree a manual change would be preferable but it will take some re-engineering to make the existing parts work. Good luck. Jeff 84 Honda Franken'ceptor On 11/2/07, Travis Gintz <[EMAIL PROTECTED]> wrote: > > well, its not like a clutch... comet and hoffco are just the CVT. The > engage RPM is when the V-pulley starts to get smaller and change gear. > Look at the manuals for them and the exploded view. It starts to pull > outward on these little feet that force the pulley to get smaller and > move in, thus changing the gear ratio. I looked at them and they > actually said they're 95% efficient, and not a bad price at all. > > I might get one to experement with sometime. > > So, Its automatic changing, but it would be cool if it could be > changed with a cable or something... so you could decide the ratio. > But I don't know if it wouldn't be better to have it automatically > adjust the torque needed to accelerate... so why go manual. > > On Nov 2, 2007 6:44 PM, Bob Martin <[EMAIL PROTECTED]> wrote: > > > > > > Is anybody interested in CVT Transmissions? I've never tried one on an > > electric bike, but it works purdy good on my drill press. I think the > > problem with aftermarket CVT transmissions (Like Hoffco/Comet, for > instance) > > is that they disengage and reengage at some ? RPM to allow internal > > combustion engines to idle (Putt, Putt, Putt, ...) These transmissions > are > > being used on snowmobiles, ATV's, GoKarts, Minibikes, etc...I've been > trying > > to figure out which one to buy and modify into a manually operated CVT > that > > is always engaged, exactly like my drill press. I would gladly gut my > drill > > press, but it's only rated for fractional HP. If we can put our heads > > together we can develop a pretty cool bike tranny. Transmissions will > help > > us go faster! Later, Bobcat > > > > -- > Travis Gintz > 1986 Honda VFR AC conversion > Http://blog.evfr.net/ > >
