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Dirt Bike Discussions By Brand
Suzuki MX & Off-Road Dirt Bikes
My new 01 RM250...crapola....
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[QUOTE="Micahdawg, post: 897468, member: 21668"] I've come to the conclusion that my head was milled since I found numbers etched in a spot that say "25". And I'm confident that this bike will not run on 93 octane gas without detonating. So my knocking, irratic idle, wierd power delivery down low I'm sure was detonation. Last night I did a compression test and it pulled 200. Was hoping for something rediculous, but 200 didn't seem too abnormal for 93 octane. So I popped the cylinder head off and found a piece of the piston is gone. This is a brand new Wiseco Pro-Lite. I've put about 3 hours of riding on it while it was acting up. The missing piece is on the exhaust side, top edge right above the ring. It started peeling back along the ridge, but only 1/3 of what loosened up was completely gone. Looks like the chipped piece of piston passed right out the exhaust. I don't see any marks on the exhaust valve or the cylinder so it looks like I've gotten pretty lucky. The cylinder head has ZERO pitting, the very middle-to exhaust valve side of the piston top has some very slight pitting which I guess is evidence of detonation. The top side of the rings and piston are a little dark looking (kinda blued) which I guess is evidence of high temperatures. So.....I'll be ordering yet another piston. Probably the same thing. This piston was flat top design, but I think the part number cooresponds with the "Pro-Lite". Does this sound right? Also, i noticed the governor rod actuator was loose. It was connected to something inside the case, but moved up and down very freely. Is this right? Seems like it should not be able to move up and down as freely as it does. Micah [/QUOTE]
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Dirt Bike Discussions By Brand
Suzuki MX & Off-Road Dirt Bikes
My new 01 RM250...crapola....
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