Look below at the setup I have. I have ample torque to perform very well with these tires. I have 60% stiffer springs w/ a stock clutch. I have almost no wear on my clutch plates but cannot run WOT on hills (sand) in 3rd, 4th or 5th without big time slippage. What kind of clutch system are you guys running with similar setups. Oh, BTW my quad weighs in at 485 pounds wet and I weigh 180.

Ron

 

sounds like you just need a heavy duty clutch

 

There is a alba clutch set up that adds a extra clutch plate(barnett) maybe that setup with the 60 percent stiffer springs would hold up for you....there are plenty of guys on here with high hp machines that will tune into this post.

 

It is time to refinish the steel plates.
The crosshatch on the plates has been polished off and now the fiber dics have no surface to bite into. If you do not refinish the steel plates the fibers will gloss up and then are junk.
The crosshatch adds bite and allows oil to wring out so the plates run cooler.
Oil is trapped between fiber and steel plates. If oil cannot get out plates will overheat and gloss the fibers.

Some quidelines:
Use 300-320 sandpaper(black wet/dry)
Cut a strip 3x8
Tape to peice of glass for flatness or flat countertop - length away from you
Lay disk on paper with paper going threw center of disk at 12 and 6 o'clock
Pull towards yourself 2 times
Rotate width of paper and continue till crosshatch is across all of disk
Turnover and do opposite side as above.

What type of oil are you using?

 

The Barnett 9-disk clutch with your 60% springs should do the job. HPR sells them.

12 paddles probably isn't helping matters either. Try some 8 or 9 paddle haulers and you should be able to run a lot taller gearing with the kind of HP your making.

 

what kind of oil are u running with your set up? u might also want to try the redline clutch springs , i think they are 80%..u might want to check with gary at tvi..thats where i got them...

 

I am running T-4 Synthetic Blend. I really like my gearing and I love the hook-up of my tires but I do want to solve the problem the best way. I see what you mean about resurfacing my clutch plates now that I have spun them. That will be tedious. The quad is very playfull with this tire and gearing setup. I was running 9 paddle 22" extremes last weekend and I could not get hook up for anything in 2nd or my shift to third. If I went back to those, what gearing would give me the best balance of traction and rev speed? (million dollar question)

 

I've been told by many riders that the PAMI springs are much stiffer than other well known brands, inexpensive swap out that may help considerably??

 

Fewer paddles are usually used for hill shooting as oppossed to flat drags to free up HP, but gearing up and/or taking off in higher gear is required when you do this to make up for lost traction off the line. The 9 paddles will work on the hills if gearing is increased, but I think once you go up in gearing you will be back to the same clutch slippage issues. When you gear up there is less shifting and you don't need to use 5th gear.

The oil you use will have an affect on clutch slippage. I always use oil that is JASO MA rated for wet clutch motocycle/ATV applications - this rating gives some reassurance that the oil will not be too slippery for the wet clutch. But I am still staying away from full synthetic oil. While full synthetic is great for the motor, I have had clutch slip problems with full synthetic. Currently I use non-synthetic Valvoline 20W50 4-stroke motocycle oil.

I don't use stock frictions they will not hold the power. There are 9 disc clutch setups available which is what I recommend. I use 9 stock steel plates and 9 kevlar frictions that are 0.5mm thinner than stock frictions so the total stackup is the same as stock. Certain Kawasaki street bikes use these frictions and that is what I use. The reason I use 9 stock steels is because one of the barnett steels is too thin and warps under heat.

You might be OK with the 60% springs if you get the 9 disc setup but the more spring pressure the better. I run custom 125% springs.

The stock inner hub doesn't have enough holes evenly distributed for even cooling of the plates. I drilled a bunch of extra holes in mine to help with the cooling. See picture here: http://www.geocities.com/turbo_davec/clutch_mods.html

 

Thanks for the info guys! Scooby, where do you buy those thinner Kevlar friction plates? Those sound intetresting to me.