Question about 2003 Yamaha YZ 250

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The motor runs but wont powerband? (yz250)

I have a yamaha yz250 and i just cant figer out why it wont powerband wen you rev it up it just spluters and sounds like your valebouncing it? could anyone help me?

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  • hogan_roz Jan 27, 2009

    Thanks but have solved the problem. the exaust silencing and baffleing was blocking the tail pipe and no air could get through = ]

  • Steve Draper May 11, 2010

    Have you checked the `reeds` in the pipe between the carb and head.
    Sounds like they are either jammed with dirt or sealed themselves shut.
    They need to be spotless.
    Hope this helps you


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Clean out the entire airbox along with really clean out the air filter, use gas to clean the filter then rinse it out with warm water.iv been doing it for years, dont let anyone tell u otherwise, check the reeds, replace if needed, clean the powervalve. clean the carb. i dont no wat else could be a matter with the bike, unless its in the cylinder like no compression of broken or worn piston rings, who noes. get curious check **** out that away u dont have to waste ur time askin us. u no

Posted on Feb 02, 2009

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