21 Rear Crank 14mm 5Port +2 By pass Silver Heat Sink Code R215P-P820SG Maximum power 2.70 hp R.P.M 36.000 rpm Practical Range 6.000/44.000 rpm Bore/Stroke 16.26mm/16.80mm Ports 5 Crankshaft 14mm SG Glow Plug Type Standard Exhaust Type Rear