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Ships within 48 hours · Estimated delivery Jul 29 - Aug 3
*Ktm ignition rotor requires RDM crank or another taper adapter
Fits ONLY SP CNC cases
MinVert 6mm Studs
40mm China crank
For optimal performance
Menace90 SS Stroker Engine Porting:Ported *Ktm ignition rotor requires RDM**Built To Order. Please email and confirm delivery ETA before ordering** #1 FASTEST Engine in SoCal Races April 2025 The Menace90 SS Engine! 42mm Stroker Crank Upgrades: 52mm Bore x 42mm Stroke CNC Smolik Head Balanced Crank PGN 6202 Main Bearings Viton Crank Seals Specifications: Displacement: 90cc Bore: 52mm Stroke: 42mm Cylinder Material: Aluminum Nikasil HP: 10 12 hp Torque: 6 6. 5 ft lbs Peak RPM: 10,500 11,500 Top Speed: 55+ mph Oil Ratio: 32: