grae
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How do the valves affect the forward speed? would that not be the general running that it would affect.... With you being in the water with it, and i'm assuming that the engine is running ok? I would be looking at the clutch first, checking for full movement on the clutch sheaves.... easy way to do this, SECURELY jack it up with all four wheels off the floor, take off the clutch cover, start it up and put it in gear, rev it up and down watching that your getting full movement from the clutch sheaves gripping the belt, if this is ok then i would start looking to the internal gearbox... Is your quad engine running as normal, Ie rev range, ticking over ok, or does it sound like its not getting full revs?
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