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[QUOTE="David Trustrum, post: 164354, member: 21529"] Adding a battery assuming the control box is intact should give you the best of both worlds. You’d tell the bike had been eating its . . . No I won’t go there.:silly: All the powervalve is doing is raising the roof of the exhaust port at high RPM & lowering it at low RPM. This does several things but the effect is to extend the range the engine is efficiently producing power. Yes you can lower the valve to improve midrange/bottom end as required, & on a std bike this should cause no problem at top end. If however the compression had been raised you may find that this may cause detonation problems at high RPM. [/QUOTE]
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MX, SX & Off-Road Discussions
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