flyinr1
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2000 r1, 2001 r6
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you may be able to find new cylinder head
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r6 and r1 have had problems with the exup valves, and they will make a rattle noise, many have tore the engine down to the crank looking for a main or rod bearing problem, or a valve tapping a piston, but usually is not the problem, when the bike runs strong, it is probally the exup valve in the exhaust, this is a valve that opens/closes for proper back pressure, rattle will probally be noticed more a low rpms, or idle, while the valve is sopposed to be closed, anyways just put a pry bar on the exhaust where the 4 goes into one apply a little pressure and see if noise stops, if so its your exup valve. you do have oil in the bike right? you should not have any rattle noise on a bike this new. hope this helps you, rember push right lean right go right. now get out there and break some speed limits.
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anyone have any knowledge with porting and poslishing head on 2000 r1, is it worth the expense, how much horsepower can i expect to gain? any got any suggestions, thanks,