clutch slips above 8k rpms

here is the question my clutch NEVER slips takeing off, no matter how hard. when i am getting on it it starts slipping around 8000 rpms. is this a friction plate issue or a spring issue? any advice would be helpful, thanks in advance.

Clutch-cable adjustment?
Clutch adjustment?
How many miles(that You know of) on that clutch-pack and springs?
Have You had it apart and inspected it?
Need some more info,Bud...

shift at 7500 !oh wait:blush: like sandy said.adjust clutch 1st then go from there;)

there will be spec's in your manual for plate thickness and spring length,if its not the cable or clutch gear adjustment.

thanks for the responses. as for miles on the clutch i have no idea but, i have put 1862.2 miles on it since ive had it. i can tell you this much the person who had it before me didnt believe in maint.. my mechanic says it is probabaly springs. i will check it out later this week when i put new front tire and progressive springs. i have been changing the oil about every 500 miles(you should of seen what came out on the first oil change:ohmy: anyway thank for the responses and more are welcome since i need to order the part or parts so they can be here by thurs today is sat. thanks again

If you're going in there replacing parts, you might as well upgrade to an aftermarket clutch. I have a Barnett clutch in mine, over 3 years old and doesn't slip, but it does drag a bit when it gets hot in traffic. Apparently there are better choices out there than the Barnett, check with APE

thanks for the info Fossil. i plan on building up a turbo bike and i have heard that the aftermarket clutches will destroy a turbo.

I've heard clutches disintegrate and the debris goes through the oil messing up turbocharger bearings, but that might be another one of those stories going around.
For Turbo info, you should be visiting Lorcan's site. Huge amount of info over.
750turbo.com/

What oil ore you running? Not the "energy conserving" cage oils I hope. Those oils WILL make your clutch slip at high load. Something about the additives in auto oils that reduce friction, but whadda I know....I just ridem, cuz if ya don't..... they DIE!

kzkrazybiker wrote:

What oil ore you running? Not the "energy conserving" cage oils I hope. Those oils WILL make your clutch slip at high load. Something about the additives in auto oils that reduce friction, but whadda I know....I just ridem, cuz if ya don't..... they DIE!

energy conserving? that term is new to me. i am running the same oil i have been running for 15 years castrol gtx20-50. maybe this is wrong but it has never let me down. i have tried other oils like shell rotella and found that they take to long to get to the top end. oil light will usually flash for about the first 1/2 mile of riding. also ive never had a bike that didnt lose oil from blow by or just leaking so ive never ran any of the $8 a quart m/c oils (but with this bike im working on that have a complete 810 gasket kit waiting to put pistons in and a few other things)wife and kids are very needy so its not happening as fast as id like but im getting there!

Fossil wrote:

I've heard clutches disintegrate and the debris goes through the oil messing up turbocharger bearings, but that might be another one of those stories going around.
For Turbo info, you should be visiting Lorcan's site. Huge amount of info over.
750turbo.com/

fossil you are too wise! i knew something happened to them. now i know.

I have rode the bikes wit barnett's in them, they dont slip, you are either going or not, seems like the best thing is aftermarket clutch and stock springs so you dont wear your hand out