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MX, SX & Off-Road Discussions
Dirt Bike Mods & Maintenance
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[QUOTE="hillclimber, post: 156724, member: 24531"] So would that mean that on top end the cylinder scavaging is improved and making more power? If so why does everyone claim that a rad valve is'nt any good for top end becuase when you install one you also have to go leaner on the main. The reason for my curiosity is that on my 86 CR500 I had Erric Gore port work and a rad valve, bored carb, K&N air filter and PC pipe and I went from a 172 main to a 162 and probably could get by with a 160 main. Thanks for any more info. :) :) :) [/QUOTE]
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MX, SX & Off-Road Discussions
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porting,jetting,
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