spridget· Premium Member
Every sportbike I have owned revved above 13,000rpm, was a 4 cycle, 4 cylinder engine, with OHC.Originally posted by Patrick Norris@Jan 14 2004, 09:50 PM
You can't really compare your motorcycle to your car engine. You didn't state what kind it is but most bikes are 2 cycle which don't have valvetrains at all so there is no limiting factor there. The other factor is number of cylinders. A 1 cylinder bike engine isn't gonna have the reciprocating mass of a multi cylinder car engine.
My '98 Honda CBR600F3 has 600cc and runs the 1/4 in 10.93sec. stock.
The 4 cycle sportbike motorcycle engine is the same as any 4 cycle car enigne internally and fundamentally. The main differnce being a much smaller bore and stroke, less mass, higher revs, and very little torque.
You are thinking of 2 cycle dirtbike motors.