Specifications for K4.6 High Output (#15204)
Displacement: 4.59cc
Bore: 18.6mm
Stroke: 16.9mm
Practical rpm : 3,100 ~ 39,500 rpm
Maximum Horsepower at RPM: 2.95 hp @ 38,000 rpm
Maximum RPM : 41,000 rpm

Carburetor
Type: Composite Slide
Bore: 9.0mm with 8.0mm and 8.5mm reducer