lt 80 clutch

[sp01]

i have a lt 80 with a big bore kit and i keep blowing the front clutch apart why does this keep happing

[LT80]

Without knowing more, I'd guess that there is a vibration.
Please explain in more detail on what the clutch is doing.

[sp01]

the outside part of it keeps striping out and then it blows apart in about three pieces

[LT80]

Okey dokey,
How about that vibration? Is there any?
The outer face strips, but what about the splines on the crankshaft? Are they damaged?
Do you put the spring washer on correctly under the nut?
When you open it up, Is the nut tight on the face then bushing and the rest is broke off?
Are you using the long spacer/bushing or the newer style short spacer and big washer?
You've made double-triple sure that the key is aligned with the notch in the roller plate when you installed the front clutch? All that ain't spinning is it?
Is this a modified fixxed face?
The rod bearings (crank and piston) OK?
Grinding any? Crankshaft bearings?

Off the topic,,
Did the 96cc kit <EG> give you a noticable difference in power?
Did it give you what you expected?
:)

[sp01]

it has 3 hr on a new top end
when i took it a part the nut and washer where still on the crank end is good
its on the key i do have some play in it about 1/2 in
it has all kinds of power when i can get it to run now i cant even get it to start

[LT80]

hrumph...
I still think that there is a "out of balance" situation somewhere.
I do think you have the variator on correct.
Does it still have compression? I'm thinking the piston sorta siezed and is causing problems.
You might want to pull the head and see if the cyl walls look ok.

[sp01]

ya it has 175psi cold cranking i will pull the crank out and get it checked for balance and start agan thank you

[LT80]

What octane fuel are you running w/175# comp?

Too little octane may cause a detonation, which may be a source of vibration..

You never have answered my vibration question. When it was running, did it vibrate unuaually?

Man dude, I feel for ya here..For what you spent on that big bore, and the cost of the fixxed faces, you could have been close to a ported stock bore cylinder that would be dependable..:(

Curious, why did you choose the big bore option?

[blevinsbulldog]

Jack, will you pm me what it would cost me to get you to do up my engine.

[sp01]

i dont notice a vibration im running 110 racegas with amsoil mix 60/1 i bought the bike for 1000 with the big bore kit in it and just put i new top end on it after i had it for a few years but i have been told it has a full race port top and bottom shaved head but stock carb

[LT80]

I don't know what more to say.
Something is making it grenade the clutch.
I thought sure it'd be a vibration.....:(