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2004 YFZ 450 bored over 98mm. Runs on straight 110 VP race fuel. Starts an runs amazing take it out an drive it runs good till everything gets warmed up. (It dies on me an it’s not like it just dies it bogs down then dies.) An when this happens there’s no stopping it no throttle response no nothing at all. I have to wait till it cools all the way down it start runs fine till it gets hot then same problem. Replaced stator, CDI box, coils. Had it dyno tune air fuel spot on. Anyone else have this problem or can help guid me with this issue.
 
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