Question about 2004 Suzuki RM 250

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RM85 w/ 105 kit bogs down with rapid throttle onset rate

The bike is new to me and I'm having trouble getting the carb adjusted. I'm running a fuel mixture of 40:1. The engine was just rebuilt. Engine idles fine and if I slowly roll the throttle, it revs up to high rpm fine. But, if I quickly roll the throttle, it bogs down until I let go. Then it returns to normal idle. The engine smokes quite a bit as this is happening. I've had the carb apart several times. It's clean. I tried different clip positions on the needle w/ no luck.

Posted by Anonymous on

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ollie reece-jones

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Hi buddy set the needle clip to its normal condition and also on the carb is the mixture screw you need to turn this all the way in and out 1 turns and try this you will always get a bog if you rev fully too quick i had this problem with my kx85 and it was just this hope this helped mate i will send the pic in a mo

Posted on Sep 17, 2009

Testimonial: "Appreciate the help. I've been all over w/ the air mixture screw. Still smokey and bogging down."

  • ollie reece-jones
    ollie reece-jones Sep 18, 2009

    here ya go buddy

  • ollie reece-jones
    ollie reece-jones Sep 19, 2009

    well this can only bee another thing piston rings give it a compression test by taking the spark plug out and putting a compression tester in the hole and kick it several times and see what it goes up to get back to me

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