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Discussion Starter · #1 ·
I have a 05 TRX 450R with a big bore 501 kit, and a +3 hot rod stroker crank. It cuts out at the top end under load, and I can rev it up to the rev limiter when it's not under load. I'm trying to figure out why it's cutting out at the top end? Do I need to jet it? Or advance the timing? Anyone have any input or suggestions?
 
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