Yamaha Genuine Yfm 350 Yfm 600 Yfm660 Raptor Warrior Air Filter Old Stock Logo

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Anonymous Posted on Jan 04, 2014

Header pipe turns cherry red - Yamaha Genuine Yfm 350 Yfm 600 Yfm660 Raptor Warrior Air Filter Old Stock

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paul karo

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  • Posted on Feb 04, 2015
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It could be an indication that the engine is running too rich. Fixing it could be as simple as replacing the air filter or as complicated as returning the engine. I would star with a new filter and see if that helps. If it has a manual choke make sure that it is fully open when engine is warmed up.
Hope this helps.
Bob

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  • Posted on Feb 02, 2015
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Related Questions:

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1answer

My header pipe on my 2003 yz250f gets cherry red hot when i start it up real quick do i need to change air filter, spark plug, valve adjustment, or get the carb rejetted thanks

If you have changed the jets you may have to try a different size. I suspect that the pipe is getting red hot from to much fuel . I think your problem is the choke. It may be sticking, have a bad plunger, or may not be closing all the way. Start your inspection there.
0helpful
1answer

My yz250f is running real hot and wont idle wright

Check the valve clearances and timing and for any air leaks around the intake manifold....Good luck matt .
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