The Plus 5 is a powerful off road engine with a 14.5mm long stroke turbo crankshaft. The counterweight has been oversized to decrease dead volume, and the crankshaft bore diameter has been reduced to improve filling and overall efficiency. The sleeve comes with some additional by-pass below the exhaust port to cool this very hot area and reduce piston wear. The head is drilled to save weight and lower the CG. Buggy/Truggy.21 engine for racers 5 ports ABC Piston sleeve Long stroke turbo crankshaft
