ROK GP Junior immediately conquered the hearts of drivers around the world, for his spirited soul and a practical structure, which aims to achieve high performance, while ensuring high reliability. DISPLACEMENT 125 CC MAX TORQUE 20.2 NM A 11.500 RPM MAX 15.000 RPM The Vortex engine has the following features: Single-cylinder 2 stroke engine, displacement 125cc, reed valve intake in the crankcase. Liquid-cooled through external pump, equipped with centrifugal dry-clutch and integrated electrical starter. It is also equipped with a balancer shaft that reduces vibrations and power valve that improves performance and driveability at low rpm. The Vortex engine comes in a complete kit with Dell'Orto VHSH Ø 30mm carburettor, Dell’Orto fuel pump, Arrow intake silencer, moulded exhaust and exhaust with integrated exhaust silencer and wire loom. (Engine Mount and Battery not included). True to the philosophy that favours ease of use and management, ROK GP Junior engine is aimed at all drivers who want to test themselves on a spirited and performing chassis. COOLING SYSTEM Liquid-cooled through external water pump MAX 15.000 Rpm (electronically limited) EXHAUST Oval exhaust and 2 boosters IGNITION PVL digital ignition BEARINGS Radial bearing C4 CARBURETTOR Dell’Orto VHSH Ø 30mm BORE AND STROKE 54.07x54mm SILENCER Arrow intake silencer MAX TORQUE 20.2 Nm a 11.500 Rpm FUEL PUMP Dell’Orto EXHAUST ROK GP moulded exhaust with integrated exhaust silencer Vortex ROK GP Engine Fiche Vortex ROK GP disassembly Vortex ROK GP assembly
