four strokes, Water cooling, Inline, injecting combustion chamber Detailed Product Description Item/ModelR6105PR4105PR4105G28495PTypeSix strokes, Water cooling, Inline, injecting combustion chamberFour strokes, Water cooling, Inline, injecting combustion chamberFour strokes, Water cooling, Inline, injecting combustion chamberFour strokes, Water cooling, Swirl combustion chamberCylinder No.-Bore* ...