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New CVtech primary clutch VIDEO

This is a discussion on New CVtech primary clutch VIDEO within the Can-Am / BRP forums, part of the Can-Am ATV Discussion category; hey guys, i am not a site sponsor, so please mods dont take this as an advertisement. this is a video i put together while ...


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Old 07-24-2010, 07:20 PM
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New CVtech primary clutch VIDEO

hey guys, i am not a site sponsor, so please mods dont take this as an advertisement. this is a video i put together while testing the new CVtech primary clutch on Flynts bike of FCP "flynts custom performance" we tested a few stall springs and a few weight setups. his bike picked up 4mph in 100ft and 5mph in 200ft over the stock clutch setup with a clutch kit in it. his bike was stalling to 2300 and shiftout at 7300 when we first started with the stock clutches and clutch kit. after i loaded up the CVtech primary and put it on the bike i made it have the same stall and shiftout and the bike picked up 2mph in 100ft and 3mph in 200ft versus the stock clutch. after getting the shiftout a little higher we ended up picking up even more mph. this was a fresh out of the box CVtech clutch, not one i had done any work to. this was as basic as it gets, and this clutch out performed the stocker like mad. anywho on to the video


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  #2  
Old 07-26-2010, 07:26 AM
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Adam,

It looks very promising! I can't wait to see what happends when you speed match em!

Please keep us updated man!
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Old 07-26-2010, 09:10 AM
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I'm with GH keep us updated, I have been to the CVtech site and for most of us running near stock motors and such, this seems like a very good alternative to throwing a few hundred at a stock rebuild. The STM is nice but not needed by most of us.
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Old 07-26-2010, 02:00 PM
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although as you can see i did pick up more and more MPH the more i tuned the clutch to maximize the motors power, but as the bike was before the new clutch, it has a 2300 stall and 7350 shiftout, so when i initially put the CVtech clutch on i loaded it up with a 2300 stall and 7400shiftout which was as close as i could easily get to the stock clutch setup with the clutch kit. just bolting up the CVtech clutch i gained 2-3mph in 100ft and 3-4mph in 200ft. this is as promising as adding a whole load of bolt-ons or even going in the motor. when i was putting the clips and videos together i could do slow motion and you could see that the 1st side by side comparison was with the stock clutch and CVtech clutch both tuned to have the same stall and shiftout and the CVtech clutch ran about 3-4mph faster to the yellow line and was about a bike and a half out front. the last side by side comparison was with the stock clutch/clutch kit and the CVtech clutch tuned to maximize the motors power and the CVtech clutch was out ahead by two full bike lengths and picked up 5mph over stock.

this video is not meant to be an advertisement, it was simply put together to show a comparison of how the new CVtech clutch performs over the stock clutch. i do not make the CVtech clutch it is something anyone can buy. i was not trying to solict business, because this clutch has had none of my work done it is out of the box stock. it would be the same as any other user could expect if they bolted one up.

the new clutch is also fixed together, the two sheaves do not rotate seperately of each other. meaning you can throw power to this clutch and not worry about slipping the belt, or the two halves of the clutch rotating and chewing up the belt.
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Old 07-26-2010, 03:22 PM
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Thanks for the vid showing us the comparison.
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Old 07-26-2010, 04:48 PM
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no sweat sir. i should have one soon of the STM setup. gotta find another day to do some testing like that. GH is sending me an STM setup to test on. i shall find out what all it is capable of and make another video.

cost for cost, this clutch will hold as much power as the STM, and costs less, weighs less, and is easily tunable. you dont have to be a rocket scientist to figure out how to work this clutch it is as easy as can be
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Old 07-26-2010, 05:07 PM
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This clutch WILL NOT hold as much power as the STM 6 or 8 weight, and probably not their 3 weight either. There's no way to add weight to the lower speed. It WILL slip when lower in the primary, no way around this, with this setup.

It definately WILL NOT hold as many RPMs as the billet STM.
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Old 07-26-2010, 05:27 PM
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these clutches are tested and balanced over 10kRPMs i dont know or care what the STMs are balanced to but i have faith in this clutch

i can assure you, if you can make the power this clutch will hold it, give me a minute to find a high HP bike i'll be glad to prove it.
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Old 07-27-2010, 06:08 AM
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Quote: Originally Posted by ///AIRDAM View Post
these clutches are tested and balanced over 10kRPMs i dont know or care what the STMs are balanced to but i have faith in this clutch

i can assure you, if you can make the power this clutch will hold it, give me a minute to find a high HP bike i'll be glad to prove it.
You don't understand the problem with CVT's when the belt is low in the primary, do you?

The clutch needs like double the amount of weight when the belt is low, but normal weight when it's up high. A big four stroke motor makes a lot of torque, requiring more weight when the belt is low. This clutch can't adjust for that. It'll handle a stock motor, but not a high hp motor, because of this. Mud bikes are even worse, since they never shiftout in a deep pit, keeping the belt low, and slipping with this style of clutch, and lotsa hp.
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Old 07-28-2010, 02:54 AM
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Quote: Originally Posted by ///AIRDAM View Post
these clutches are tested and balanced over 10kRPMs i dont know or care what the STMs are balanced to but i have faith in this clutch

i can assure you, if you can make the power this clutch will hold it, give me a minute to find a high HP bike i'll be glad to prove it.
Any luck on the high HP bike?
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