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MX, SX & Off-Road Discussions
Dirt Bike Mods & Maintenance
RM 250 problem
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[QUOTE="Stew312, post: 384757, member: 32795"] I have a good question for you Eric. I recently picked up a 1988 RM 250, and I can't figure it out. When I first picked it up, it had to be turned on its left side before it would start, you could kick it until you were blue in the face, but it wouldn't go until you leaned it on its left side. I rode it for a week like that and decided to fix it up. So I cleaned out the carb, blew out the jets, checked the float level, etc. (the jets in there were smaller than stock, so I put stock jets in, 370 and 20.). I put the carb back on, and now it won't fire. It only backfires (more of a weak fire than a backfire)every 3-5 kicks or so. I checked the carb, everything was still fine there, there is even small gas puddles on either side (air box flange, and intake flange) of the carb, but the spark plug is basically dry when you pull it out after kicking it. I checked the reed, which appeared fine to me (after all, I'm not an expert) and I noticed there is a gas coming out of the back of the carb (air box side) when you kick it 5-10 times. I replaced the intake flange gasket, between the flange and the reed, and all other gaskets seem fine (no leaks anywhere). Could I have an exhaust valve problem (causing intake from the exhaust pipe and firing out the pipe instead of down the cylinder)?? Could I have a reed problem (compression through the carb, causing the gas to flow towards the air box)?? What should I do?? Thanks alot. [/QUOTE]
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MX, SX & Off-Road Discussions
Dirt Bike Mods & Maintenance
RM 250 problem
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