3WF KN Middle Crankshaft

[KN Planning CS02 3WF KN Middle Crank]
Stroke 45.2 ± 0.3mm
(Reference: Normal 42.0mm)
(Installation and precautions)
● Piston skirt cut: approximately 1mm cut
(Varies depending on the piston used)
No crankcase modification required.
● Due to the increased stroke, upper engine adjustment will be necessary.
● When combined with a standard cylinder,
you can achieve 88.7cc, just within the SB class limit.
Compatible models:
JOG90, Axis90, 3WF engine
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