05 Rm 250 surge and bog off low end.

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11/25/2017 10:14 AM

Hey all,
I’m having issues with my Rm, I was recently at a track bike was running great and when came in it started idling high with a surge, I tried to idle it down and nothing really happened from turning idle screw, took it out again yesterday and it was acting really funny trying to start cold and when it warmed up was surging at an idle and going steady down a road (never had this issue before ) also it had obtained a bog off of low end throttle.
I would appreciate any help before I tear it down.
Thanks

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11/25/2017 12:08 PM

The left and right cases can be mis matched, so you it is possible to get an air leak on the cylinder base gasket. Worth checking

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11/25/2017 1:07 PM

Thanks for the reply
Ive never had it apart and it ran fine before that day at the track , wondering if it’s dirt in the carb leaning it out ??

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11/25/2017 1:09 PM
Edited Date/Time: 11/25/2017 1:09 PM

It sounds like maybe a left side crank seal is bad now. I don't think it's dirt in carb

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11/25/2017 2:40 PM

What’s the best way to test the seals?

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11/25/2017 2:43 PM

Start the bike and spray carb cleaner on seal and anywhere else a leak could come from. If It's Leaking The idel Will change

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11/25/2017 4:40 PM

Ok, I’ll try that ... thanks for the help

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11/25/2017 5:04 PM

The3 intake manifold could also be leaking either from the gasket or the boot having a crack.

Paw Paw

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