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Discussion Starter #1
so what are the pwr valves actually doing and hows it better than non pwr valve engine.

srx700
 

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Fixed exhaust porting in a 2-stroke can be designed to give you good low end or good high end, but not both. Most non-power valves are a compromise between the two, giving you ok performance in both areas. Power valve engines adjust the exhaust port to allow both good bottom end and good top end, the best of both worlds.
 
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