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50cc twin reving to 22,000 rpm !!!


High Miler
GT Famiglia
Jul 3, 2017
Lac Ste. Marie, Qc
I remember watching the 125 and 250 class at Daytona in 1985. I was blown away by their speed and maneuverability. The 125's were putting out close to 50 HP at around 15,000 rpm.


GT Godfather!
GT di Razza Pura
Jun 26, 2011
Findlay, Ohio
That's impressive for sure but Honda's later bikes were even more insane.

1988 Honda CBR250RR

33 kW / 45 PS / 44 hp (JIS net) @ 15,000 rpm

25.5 Nm / 19 ft-lb @ 10,500 rpm

20,000 rpm's on a 250cc 4cylinder 4 stroke. That's bore / stroke of 1.9" x 1.3"

Simply insane.



High Miler
GT Contributor
Oct 28, 2008
San Jose
I hit 16K RPM once at Bonneville on my 50cc Motori Seven. I was checking to make sure I was in 6th, released the throttle, pulled in clutch.... didn't release throttle enuf.... oooops.

Burnt piston and cylinder.