i need help clutching my zrt 800 w/ d&d trail pipes and moter stock, has roller secondary, have no idea where to start, mostly run lakes and drag race, thanks for any help.

Heres a starting point. Primary clutch run Comet AC weights (58.3 grm's). Grind the tips (the very end furthest from the pivot hole) down to a weight of 57 grams, grinding at aprox. a 15 degree angle with more taken from the inside edge of the weight. Run the Cat yellow/green primary and a straight 53 degree Cat helix. I have a BM black secondary spring, but a Cat green spring is very close too, it has a little less twist than the BM spring. This is for a roller cover secondary. Run at 8300-8400 RPM, should be close to the middle hole. She hauls ass with this set up and it doesn't effect top end or back shift. For your pipes you may have to winde it a little tighter toget theRPM higher or go to th orange Cat primary spring. Springs are about $15 each, helix is $24 and the weights are about $35. Parts are cheap enough you can buy a few springs and play around till you get it right.

Fastcat,
I have a 95 ZRT 800 that is cloned into a 98 thundercat.
It also has a M10 rear and a BLT front. I have a 98 t cat 1000 triple engine
in it with Aaen pipes. Run fine until I put the M 10 in, now it is running hot all the time.
Does yours run hot or did you add more cooling.
I am running the stock 95 track that is a .720 with 240 studs.

Just curious

I never had a heat problem unless it was very warm and snow was thin. I can't remember if this was the stock suspension in my previous sled or the M-10 I have now. I don't remember the M-10 being any worse though. That being said, for at least the last 2 years I run half a bottle of Red Lines Water-wetter and would guess it runs at least ten degrees cooler all the time. I got the idea from Chris Iverson at Performance Eng. He has run half a bottle in all his mod sleds for years. The other alternative is to add a tunnel heat exchanger like the older ZR440's had. Make one out of 1" square tubing (alum)and weld fittings on the ends. I talked to a guy who builds big bore Cats and that is what he does. He told me they all run too hot. I decided to try Water-wetter first and am very happy with the results. It's a lot less work than the heat exchanger and only cost about $10 to try it.