Looks like primary clutch slipping

[triple650]

2010 crossfire 800, has m8 gearing power claw track, new motor mounts new primary new HD secondary with 36 degree bdx adjustable spring tension helix. Also has a brand new cat crate engine.

I had this problem last year but much worse, I quickly scrubbed up the primary clutch with a scotchbrite pad and it was clean. I don't know if these marks are from last year or not. Last year I blew a belt full throttle and I put a new primary and secondary and the primary was destroyed in 5 miles, it got so hot it melted the bushings right out of the clutch. I couldn't figure out what was wrong so I put on a brand new cat clutch, it would do the same thing. Clutches would get insanely hot and the primary would have black marks mid way up the primary. I checked the runout on that engine and it was .008" out so that's why I replaced the engine. I also assumed the bad runout caused the accessive heat.

So now after doing all this work the primary has these marks on it, I went for a ride and drove it pretty hard and heat seems to be minimal. The clutches/belt are very warm but not hot like it use to be. Just need some opinions on this, or should I just run it and keep an eye on it? Thanks.

 

[triple650]

Here's one pic

 

[triple650]

Another one

 

[triple650]

This is from last year with old engine.

 

[arctic2009]

Have you checked the alignment? Tried a stock secondary set up? It looks like it may not be shifting all the way..

 

[vinpie1]

too little belt deflection? Like its trying to start in 2nd gear and slipping? is you belt sticking up out of the secondary a 1/16th of and inch? Make sure its tight!

 

[diggerdown]

I think the secondary is not shifting and the primary is fighting it.

 

[worx53]

It helps a lot to shim the spider so the sheaves are closer....010-.020" helps alot .

 

[mbcat]

I notice in pic 1 you have stm solid mounts. Have you checked the alignment. Goodchance one of your primary weights is misaligned or binding by the looks of the primary smear.Also verify your gearing. Almost looks to me like tall gears and primary can't pull that track load.

 

[triple650]

Yea I have about 100 miles on it now and it's fine.