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Old 01-03-2006, 08:49 AM   #1
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Sled: 2005 700 Sabercat
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I have a 95 ZRT 800 and I am looking for suggestions on changing my clutching.

Stock gearing
Stock exhaust
9 post primary clutch
orange/green 170#/300# spring
62 gram weights
Non roller secondary
Stock yellow spring - center hole
57/50 helix
Race Logic porting
Stock heads
Wiseco Pro-lite balanced pistons
V-force reeds
UFO's
450 mains - plugs look good, light cocoa brown
240 Studs

Engagement is currently at 3800 rpm's
Over revving a bit to 8500 rpm's

Aggressive trail riding and drag racing

Just looking to get a bit more out of the old girl.
If I get a roller cover, what do I have to change the helix to, I heard you have to drop a couple of degrees.
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Old 01-03-2006, 01:53 PM   #2
JMY
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Sled: '01 Thundercat 1000 '01 Pantera 1000
Here is some info I found on HCS for clutching your sled....hope it helps!

JMY


Here is a cheap clutch set -up using Comet and Cat parts. 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 Comet yellow/green primary spring (you have to grind the OD on both ends to get it to fit or give it a twist when to install it) or use the cat yellow/green 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. You can buy a '97 ZR440 roller cover assy. for about $75 list from any AC dealer. It is a direct replacement for the stock button cover. The 98 roller secondary covers are a new design, so to use a 98 and newer you need to use the complete secondary as the cover will not work alone. 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 the deep snow you need to wind the secondary tighter so it runs a couple hundred more RPM and for drags back it off to 8100-8200 RPM. Springs are about $15 each, helix is $24 and the weights are about $35.
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Old 01-04-2006, 07:25 PM   #3
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Sled: 2005 700 Sabercat
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Thanks, anymore suggestions
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Old 01-05-2006, 02:31 PM   #4
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Don't mean to jack your thread, but did you do the porting yourself or did you send the cylinders to Race Logic? And did you notice an improvement?
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Old 01-05-2006, 09:02 PM   #5
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I did the porting myself. I had just changed my clutching (ran very strong) before I ported it and I put in new wiseco pro-lites at the same time. I broke the motor back in and ran it. I was so far off on the clutching it was nuts, the setup I have in right now is basically the same as a 1000 T-Cat. I have a slight hesitation at intitial launch with the heavy weights so I may drop down to 60 gram. I feel the porting did its job and gave me a significant boost. I beieve that Race Logic has all of their kits on sale for $59.95 right now. If you have the tools it's very easy compared to porting heads on a car.
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