I've had my Cudney kit now for one season and love it. but after only 300 miles or so I've blown a new 067 belt after a slow break in period.,all alignment and offset was calibrated when i installed the kit.The belt didn't explode just lost a 2 inch chunk and started to clunk at low speeds I could hear it.is there something else I should be checking or should I use a different belt?

I would imagine that bills stuff is calibrated using the softer 127 belt.

How does a 152 compare with the 127 cause thats what I have on there now.

I ran bills kit on my 7 last year with the 067 and had no problems. The title of your thread say hot clutches so maybe its not the belt that is the problem. Even though you buy a kit there are still many varibles that need to be right for it to perform. If you have hot clutches something is not tuned properly. Are both clutches hot?

I've aligned the clutches to spec offset,deflection is calibrated properly. The primary is the one that seems to be hot and it fryed a brand new belt with only 500K .I've got a 152 on there now but haven't put many miles on it yet from last season. I'm gona double check all measurements again this year prior to riding but thought maybe someone would know what else I could try.I also dropped a tooth on the top. The kit really pulls nice and last year was my first year with it, I don't really want to take it out.

I would be checking for a soft engine mount. The dead give away is checking your y-pipe coupling and see if it's polished beyond where the pipe normally sits

Yeah, somethings not right. We installed a Cudney kit on our 99 MXZ 600 a few years back and it performed flawlessly. Good luck, think maybe Thumbdoctors on to something.

Might want to try a lower finish # spring in the primary.

I've had my Cudney kit now for one season and love it. but after only 300 miles or so I've blown a new 067 belt after a slow break in period.,all alignment and offset was calibrated when i installed the kit.The belt didn't explode just lost a 2 inch chunk and started to clunk at low speeds I could hear it.is there something else I should be checking or should I use a different belt?[/b]
Which sled is it on? MXZ600?

Can someone be so generous as to post the specs for the clutch alignment etc. just so I make sure have got the right ones. i looked at the mounts and they seem pretty solid, will this 152 belt be ok or should I spend another 100 bucks on a new 067

Typically the belt cogs coming out have nothing to do with clutch calibration, the reasons for this failure are incorrect installastion, such as wrong direction, or excessive rubbing on the center post of the clutch at idle and also old belt even though you had a new 067 from the dealer the odds are that it may have been 3 or 4 years old and that will also cause delamination of the cogs because the life is comprimised by the age of the belt sitting around. -- Bill

Can someone be so generous as to post the specs for the clutch alignment etc. just so I make sure have got the right ones. i looked at the mounts and they seem pretty solid, will this 152 belt be ok or should I spend another 100 bucks on a new 067[/b]

Pulley distance apart (Z measurement) = 16.5mm
Pulley offset (X measurement) = 35.5mm
Pulley difference (X minus Y) = Min +1mm,. Max +2mm

When you visit your dealer ask them to bring out all their 067 belts. Bring a tailers tape (flexble ribbon) measure and find the shortest belt then smell it. If its a fresh belt it will smell like it and you will be able to press your thumb nail into to sides. If the dealer gives you a hard time ... tell them its your @#!! money. As Bill said belts have a "shelf Life" too. I've seen belts stored in direct sunlight (no no! ) and covered with exhaust residue from sleds running inside, fork lift trucks and poor furnace operation. The best way to store a belt is in a plastic bag in the dark.

What type of riding were you doing. I had the same thing happen on my 99 Formula Z 670. I was hill climbing & working the clutches hard. I didn't have a clutch kit but I wish I had one of Bill's kit. I can see why you want to keep it, I have Bill's kit in my rev & I will never go back to stock again. :thumbsup:
I was going to say give Bill a call but I didn't know he was a snowmobileworld member.
Hey Bill, good to see you are member :D