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983 Posts
For the fucken 3rd time!

Mate. Change cams = change breathing from crankcase
Unmodified 650 dont need cams whereby your torque has gone when you want to pass a car doin 80 coz your not 'on cam'.
Nitride EX cam means you dont have to oil it so u can block that oilway for more oil to big end.
750IN/Tonys nitrided EX with big bore kit breathing through front cavity with a reed valve (not the 750 breathing through primary use the same oil bullshit) is a good setup. IN is spitfire profile talked about in Shentons book.
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