Drew said:600 you mean yeah?smiley_666 said:it is one complete revolution of the crankshaft. usually measured by the number of sparks per an amount of time. i.e. 10 revolutions/ second, 10 sparks per second (on wasted spark ing system, 5 for a conventional ign system) = 6000 RPM.
In a CBR250 at 18000RPM each piston is going up and down 300 times a second