[pysco]

have an 04 600 efi mc, lost 2 pistons last winter on the clutch side,both burned down on the exhaust side of the piston,it only seems to happen during wot,go up to 3/4 trottle the sled is the best kind but as soon as you go wot on a lake for a mile or so the piston melts on the exhaust side.any ideals on the problem?

 

[milehighassassin]

I hate to state the obvious... but Fueling.

Any mods?

 

[CFM-Z440]

Check your clutch side crank seal. If it has been leaking it could do it. I have seen belt fibers get into them before and tear them up.

 

[pysco]

no mods.

 

[milehighassassin]

What is your oil use like?

 

[mcflying]

<div class='quotetop'>QUOTE (CFM-Z440 @ Dec 26 2006, 09:35 PM) <{POST_SNAPBACK}></div>

Check your clutch side crank seal. If it has been leaking it could do it. I have seen belt fibers get into them before and tear them up.[/b]

I vote that as the first suspect to.

 

[pysco]

oil use is good.trying to get a handle on this before i use the sled this winter.hav'nt checked the seals yet.