Can Am stock clutch mod

teeroy · Sep 24, 2014

A friend of mine has come up with a solution to excessive clutch heat leading to the belt shredding that occurs on the hi hp can am models.....Commander, Maverick, Outlander, and Renegade. if you've ever split the primary apart and checked out the taper that holds the two halves together you will see that it is a lot different than a sled clutch with much less mating surface. this lets the outer half slip on the taper causing belt heat and eventually failure. He has partnered up with a US company, and will be offering this mod very soon. you must send him the two halves, the mod will be done and shipped back to you with a very short turnaround. cost is $200, buyer pays shipping each way.

these are the pieces that will need to be sent.

here is the thread on the Commander forums where they have made their pitch.

OEM clutch fix - Can-Am Commander Forum

he is also a member here, but doesn't post much. you can send him a PM or use the email feature if you are interested.

he is the first guy to have put a Maverick diff into a Commander, his machine has extensive mods that are too many to list here. he knows his stuff and owns a repair shop here in town.

Bigblack · Sep 24, 2014

MrRPM is not a believer....(see Commander thread Pg 16)

teeroy · Sep 24, 2014

Bigblack said:
MrRPM is not a believer....(see Commander thread Pg 16)

can't find it, can you put up a link to it?

edit: sorry, thought you meant here. of course he's going to try and convince a guy to spend a grand on aftermarket....if you are into making big hp most have gone to cv tech or stm....this is for stock hp machines that are eating belts.

turbo392 · Sep 24, 2014

Why not just assemble the taper with Loctite green bearing retainer? That stuff will hold a round peg in a square hole under industrial stresses and still be removable. It's a machinists' wet dream.

QuintinG · Sep 24, 2014

I read some of that thread on the commander forum. Sounds pretty cool. Makes me wanna mark the parts of my primary and see if I suffer from any slippage. Since I haven't had any belt problems in the approx 2500kms of abusive riding I've put my quad through I'm more just curious to see if this is something that I might want to keep an eye on in the future.

And after seeing the petty and childish posts by MrRPM in that thread I can tell you I will never do business with a prick like that.

Thanks for the interesting and informative post T

teeroy · Sep 26, 2014

QuintinG said:
I read some of that thread on the commander forum. Sounds pretty cool. Makes me wanna mark the parts of my primary and see if I suffer from any slippage. Since I haven't had any belt problems in the approx 2500kms of abusive riding I've put my quad through I'm more just curious to see if this is something that I might want to keep an eye on in the future.

And after seeing the petty and childish posts by MrRPM in that thread I can tell you I will never do business with a prick like that.

Thanks for the interesting and informative post T

I haven't had any trouble with the belts on my commander either, but I know of a few guys that hate theirs because of blowing belts. I didn't believe it could be an issue at first when I first read of it happening, but guys did exactly that, marked the sheaves and discovered that's what was going on. some have even posted pics of the groove worn into one side of the sheaves from it slipping so bad. learn something new every day i guess.

lloydguy · Sep 27, 2014

My buddy has been through 3 primary's 9 belts and 1 set of bearings on the secondary.
Warranty covered 1 primary and the bearings.With about 700 km's on the machine he is
about fed up.
(commander)
I will forward this info to him.

KWIK RACING INC. · Sep 28, 2014

yeah I have known Greg... mr. rpm from way back say 2007 ....lol ... I agree ... would nt buy nothing off that man.... BUT.... what you have to remember that with the stock primary... only one sheeve turns... the other one is stationary... that's what slips belts the most... stock clutching is just quite inferior even thou many have had no problems with them... but over and over again you hear about the ineffecent stock clutches... BUT don't knock it if you never have tried aftermarket clutches... day and night for your quad....

now this mod, I have not heard about ... so don't know much about it... but one of the best clutch guru's in North America lives in Texas and I will run this by him.... see what he says....he is a leading expert on the stock, cvtech, Qsc and STM clutches... primary an secondary...

KWIK RACING INC. · Sep 28, 2014

Russell got back to me... he just laughed and said.... quote...

Absolutely hate this mentality. You have a ton of spring and weight options to mold the shift profile needed

snake oil is snake oil.... that's all that's to it... don't get sucked in.... if your thinking of anything... give Russell Coker a call or email him..... He is one of the most expert guys that know all the clutches... and can give you some real insite.... he owns 3P Offroad Pit Proven Performance in Houston Texas.... do yourself a favor and talk to him... don't get screwed over.... give him a call at shop 1 832 761 1046 or on his cell at 1 713 560 7573... its your money....

Bigblack · Sep 28, 2014

KWIK RACING INC. said:
.... what you have to remember that with the stock primary... only one sheeve turns... the other one is stationary... .

Really Guy? Common. Give your head a shake. Both sheaves turn. They are not locked together vi a spline (just a friction fit) and so the outer *can* slip independently from the inner.....but one sheave is NOT stationary. A method to lock the halves together may prove good for 9 outta 10 riders. Guys that run "extra power" probably would benefit from an aftermarket primary.

KWIK RACING INC. · Sep 28, 2014

that's how we say it.... it might as well be stationary....but yes your right... it does turn and the way I said it there, should have elaborated on that comment.... not having both sheeves locked together makes one sheeve sort of stand there and do nothing except go round and round....

I mean it might work ok but the stock clutch is so crappy in other ways too.... for a stock applicaton it might be ok, like you said.... I have never seen any of the clutch experts in the US do this... so I was running it by the guys that do all the cluthing for the pro and am racers in the south...

here is the explantion on how the stock clutch works and is put together....

The stock spider has a smooth cone shape that sits inside a cone on the end of the post of the fixed sheave. The only thing keeping it from spinning is tension on the hold bolt and friction. It slips under a load every time

pfi572 · Sep 28, 2014

Kwik ? What do you run for clutch's ?
PM if you don't want to say on open forum? Thx

KWIK RACING INC. · Sep 28, 2014

I just wanted to say this too...on the stock clutches.....

One is called fixed, other moveable. The fixed is pressed on the crank, moveable is the outer. The outer is what spins at a slower speed due to slippage where the spider slips on the post... that is what I meant by stationary.... just to clear that up...wrong choice of words, I guess...lol

I run a CVTECH with a G1 STM secondary..... on my machine....

KWIK RACING INC. · Sep 28, 2014

I would like to know how they are doing this..... I had a discussion with Russell tonight on it.... here is a quote from him ....

(want to know how. My concern is the cast aluminum spider is week, so it the are pinning or drilling into it in any way they are drastically weakening the strength. Try and I pinned them back in the day, been there done that. That spider design won't hold much power if they are doing anything similar to what we did)

so I would say before you give a stranger your money and clutch....do some homework....

KWIK RACING INC. · Sep 28, 2014

the cvtech is an excellent clutch... I mean I have been running mine since bike was new... and I have over 10 thousand k on it.....

I mean I do have a powerful motor making 90 rwhp....and the cv shines.... Drag racing really shows the proof is clutches are working good...... this year already I have two second place and one 1st place finish in Alberta here in the 300 ft drags..

the bike performs just as well on the trail and mud...

Bigblack · Sep 29, 2014

KWIK RACING INC. said:
I just wanted to say this too...on the stock clutches.....

KWIK RACING INC. said:
One is called fixed, other moveable. The fixed is pressed on the crank, moveable is the outer. The outer is what spins at a slower speed due to slippage where the spider slips on the post... that is what I meant by stationary.... just to clear that up...wrong choice of words, I guess...lol

I run a CVTECH with a G1 STM secondary..... on my machine....

Your CV tech also has a fixed and a movable sheave. "Movable" refers to opening and closing, not turning independently from the fixed sheave. Press fit isn't always a bad thing....the BRP sled TRA V and up are press fit and hold a lot more HP than the quads. Also....all clutches (including your CV tech) are press fit (taper fit) onto the crank itself.

Can Am stock clutch mod

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