Question about Suzuki RM 250 Motorcycles

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My suzuki rm 250 starts and runs for a few seconds then stops . I have taken carb of and cleaned it out and seems to be fine. there is also a really good spark from plug.

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First up, check all electrical connections are good, especially magneto wires exiting crankcase and CDI and coil. Check the continuity of the different phase wires with a circuit tester to be sure.
Disconnect the manifold from airbox to rear of carby, at least enough to put a flat piece of cardboard against back of carby throat inlet. Start, and if bike stays running, you have an obstructed air filter or airbox inlet.
If it still stops, then place the cardboard firmly across carby inlet and turn over engine with throttle open. There should be fuel visible on the card. If no fuel on the card, you have fuel delivery issues and likely cause is an obstruction in jets or float needle/seat. Check condition of fuel filter and fuel flow from tap also.
If you have fuel visible on the card you may have badly set air mixture screw (generally 1.5 turns out) the wrong sized jets fitted or a leak in the inlet manifold. Are the reeds in good condition?
Goodluck, cheers!

Posted on Nov 14, 2010


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1983 Suzuki RM 250 wont stay running

Hey Cody,
>>> DO NOT "BOIL" a carburetor... that is NOT HOW YOU CLEAN A MOTORCYCLE CARBURETOR!!!!!!!! That is an old school, RED - NECK, backyard, UNQUALIFIED way to ATTEMPT to clean a carburetor!!!!

Take the carburetor to a QUALIFIED PROFESSIONAL motorcycle mechanic and have him clean and set your carburetor!!!!

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