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i have a 2005 450r that will run fine up to half throttle after that at cuts out and loses all power. i already changed the plug and cleaned the carb. any ideas?
 

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Does it do it even in nuetral? Every gear? Either jetting or CDI going out would be my first guess.
 

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If it doesn't do it with the choke on, you need to rejet. You are running to lean, the choke richens it up.
 

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Just tell the bike shop your condition and tell them you need to richen your air/fuel ratio. They should get you set.

Have you recently done any upgrades? A jet could be clogged if it just started out of the blue.
 
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