Question about Yamaha YZ 450 F Motorcycles

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I have a 2006 YZ450F that runs great when cold. As soon as it warms up it begins to pop and bog and backfire. As soon as it is hot, it stalls. I have to wait until it cools down to restart it. I have cleaned the carb, checked the hot start plunger, checked all of the intake tract. I have OHM'd out the stator when cold and it is in spec. PLEASE help! thanks!

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Try Power Now - from Scary Fast and it goes in the carbuerator - helps with popping, and gives you better low end with quicker throttle response. And you could get boysen quick shot - it bolts onto the carb and helps as well - google it - I have the same bike and that's how I solved it! Good Luck

Posted on Jul 23, 2009

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Vacuum leak? Tank breather blockage?

Posted on Jul 01, 2009

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