Question about 2003 Yamaha YZ 250 F

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What aboute the exhaust get realy red and orange on the exit of the celinder

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  • Anonymous Mar 06, 2009

    how do you richen fuel on yz250f carb?

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If this is noticeable in the daylight, your fuel mixture is probably running very lean (not enough fuel) and you should not run the bike until you find out why (carburetor issue possibly). If you only notice this at night, a dull orange glow is not unusual, if it is bright red or goes very far down the pipe your mixture is probably lean.

If you continue to run the bike in a lean condition you will likely damage the engine severely, blowing the headgasket or burning the valves.

Posted on Feb 27, 2009

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