Quote:
Originally Posted by Pygmygod
How old is the exhaust packing?
Do your exhaust o-rings leak/damaged?
Stock pipe or aftermarket?
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This is a 2018 with low hours. Packing is good. Stock xc fmf pipe and also same with fmf fatty. O rings seal well. I have it jetted perfectly and have also added an RK Tek head since the stock head is very poorly set up. That added enough power to make it ok, but it still is not right.
This is absolutely a power valve function issue. I can't believe I haven't found any manual that states what rpm the valve should start to open or fully open!