Complete Shifter Engine Kit, Includes Motor Mount, Cooling system NOT Included (Radiator, Pump, Belts) Single-cylinder 2 stroke engine with six-speed gearboxDisplacement 125 ccReed valve intake in the crankcaseLiquid-cooled through external pumpPush-to-start systemMixture-lubricatedPVL analogic ignitionDry clutchDellorto VHSH 30mm carburetorArrow intake silencerDellorto fuel pumpBore and stroke 54x54.5mmCast iron made cylinder5/3 transfer ducts intakeOval exhaust and 2 boosters43HP at 13.900 RpmMax 14.000 RpmShifter Rok molded exhaustExhaust silencerFront clutch gearbox systemRadial bearing C4The Rok Shifter was born to meet the needs of many drivers who want to compete in a category with the gearbox, but always according to the Rok philosophy: low costs and steady regulations over the time.The engine has the following features:Single-cylinder 2 stroke engine with 6-speed gearbox with front clutch system, displacement 125 cc, reed valve intake in the crankcase. Liquid-cooled through external pump (not supplied in the kit).The engine comes as a complete kit with Dell'Orto VHSH 30mm carburetor, Dell'Orto fuel pump, Arrow intake silencer, molded exhaust and exhaust silencer.Ready for a power of 43 HP, the Rok Shifter is the engine that provides the best combination of performance and operating costs.