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Re: Head Porting Question
People have run 8500rpms on 272s with stock valvesprings since the dawn of time.
264s, 272s, and 280s all have the same 10.3mm lift and the same ramp rates, so if whatever spring works with the 272 will work with all of them given the same rpm limits.
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07 Ducati Monster S4R
00 honda elite 50 (64 mph braH!)
05 malaguti F15
04 E55 AMG
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