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MX, SX & Off-Road Discussions
Dirt Bike Mods & Maintenance
Clutch side crankcase seal?
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[QUOTE="wildkats, post: 940470, member: 61992"] Thanks guys. The plug doesn't look like it's got carbon on it. It's just wet with gas/oil and after cleaning it, letting the fuel evap in the cylinder and putting the tip under some fire (as a friend suggested) it starts fine. I've also checked the spark and it's nice and bright. Also compression seems fine per the same friend and the mechanic at the dealer. I still don't get how a seal that keeps dirt out of tranny at the crank can cause tranny oil to leak into the cylinder. But then again I'm not a mechanic and obiously don't know jack about engines in general. Let me see if I understand it right, on the down stroke some tranny oil is leaking past the piston rings into the chamber thus fouing the plugs? And that's because the crank (the part that the front sprocket is connected to) seal is leaking air into the tranny? One thing I did not check was the reeds. Can that cause a rich mixture also if they don't close correctly? Delius [/QUOTE]
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MX, SX & Off-Road Discussions
Dirt Bike Mods & Maintenance
Clutch side crankcase seal?
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