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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Posted on Jan 02, 2017

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1 Answer

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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My 2005 rmz 250 wont kick start it will push start but when i give it fuel it boggs and dies just put it new plug and it made no difference, it has spark and compression and fresh gas...please help!!!


there are 3 things you can do

1. replace fuel filter
2. clean unclog fuel line
3. clean carb

heres a link to a complete tare down of the carb

http://www.suzukipartshouse.com/?gclid=CJSPxLWE66cCFQQ-bAodDCu_bQ#/Suzuki/RM-Z250_%282005%29/CARBURETOR

good lock.

Mar 26, 2011 | 2005 Suzuki RM-Z 250

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I have a 2002 Suzuki Ozark 250 ATV. I only has about 11 hours on it and was in storage for years. I rode it without problem last fall but now is difficult to start and will not idle. I drained the old gas...


I don't have a solution but I do have the exact same problem, '03 or '04 (not sure) Suzuki 250 Quadrunner Ozark,really low hrs, left in storage for 2.5 yrs, gas went bad, cleaned it out, now hard to start and won't idle by itself.
I have taken the carb apart and cleaned it out, but did not replace anything, and it will still not start very easily or idle. Before I took the carb apart I thought it was flooding because it would start with the accelerator wide open, but when I would let off, it would die again. Whats going on?? I really don't want to pay to have it fixed.

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1 Answer

A fterI warm up my 01 rm 250 my bike don't start


Possibly the choke is getting stuck internally, Even thoug the leaver may be in the closed (normal) position, it may be sticking internally. Try removing the choke and cleaning the passage with some carb cleaner, then replace the lever. The bike could run with a partially cloged choke but would be tough to start when warm due to too much fuel. Another thing to check, when it is hard to start, just after kicking it over a few times, remove the spark plug and see if it is wet with gas. My guess is that's it's soaked. Good luck.

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try adjusting the needle jet on the top of the carb down one setting this will raise the needle when getting in the throttle. Altitude has alot to do with this setting of the needle jet also. UM if this doesnt work try goin up one setting from original if this doesnt work the power valve may be malfunctioning till it gets lose and then works fine till cool down may be sticking.

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