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WHAT KIND OF CLUTCH KITS ARE YOU GUYS RUNNING ? OH YEA GOT BACK FROM SHEBOGAN WIS. YESTERDAY RAN THE F7 FOR THE RADAR RUN. BEST SPEEDS IN 660' WERE 84.6 , 85 , AND 85.3 MPH AND THATS BONE STOCK EXCEPT FOR A 102 MEGA -BITES AND WITH A SCORED PISTON IS THIS GOOD OR NOT. LET'S HERE IT, OH YEA I NEED CLUTCHING. THANKS
 

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Nothing that I've measured, personally. I can only attest to VERY noticeable low and mid grunt. I'm sure others here have made more scientific notations. :D
 

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lerod,call Jeff at CPR 414-698-6611,his clutch kit works great.I use it,97.7 in 800ft. and 106 in 1000ft.Both speeds took first place,last week at Long lake,and yesterday at Lake Wisconsin.
 

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JCZ: Did you change gearing to achieve 106 in 1000 feet? What kind of peak RPM are you pulling with Jeff Simon's clutching?
 

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ArcticBrat,the kit consists of heavy hitters,a primary spring,and a new cam.Gearing in mine is stock,which I,and Jeff think is fine up to a quarter mile,maybe a little further.My sled spins 7700 to 7820,I would say 7750 is right on.I have not lost a radar run yet,my sled has a 1 inch track,and is not lowered,other F7's were running 104 &96mph.I also run shovel point ice picks.
 

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From my own experience with D&D's clutch kits they are a waste of money.. Speedwerx kits seem to be good and from what I am hearing the Dakota Performance Puts out a good one for the F-cats. ;)
 

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I ran 107 mph in Bufffalo, MN last Saturday on soft ice, 32 degrees. I can't find a clutch setup that is faster than stock. I can make it quicker, but I want total speed. D&D setup pulls hard down low and midrange but is not any faster than stock in 1000' or on top end. This has been my experience on the radar gun.
 

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I have been using The Outdoor Shops clutch kit, Springs, Weights and Helix and love it. Hit 90 mph in 600 ft or so. Tached out at 7900 RPM. The sled kept pulling, but I ran out of real estate. Talk to Dan. The price is reasonable too.

I had done some racing against our '02 ZR800 Cross Country when my sled was stock. Hopefully in a couple of weeks I will get to race it again with the clutch set up so I know how much I gained.

I raced this past weekend and smoked an '02ZR800 and an MXZ800. Had them by at least 5 sleds in the 600 or so feet.
 

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No the one that you cut 4 holes in your air box 2 on lower part and 2 on upper part, then you put the box mods in the holes and they are put on with 4 screws, they have sliders on them that you can close or open ,didn't put them in yet was thinking on getting sw intake.
 
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