This is SH.21 off road competition rear exhaust engine and it's developed especially for 1/8 scale off road racing. Equipped with three needle carburetor, was immediately recognized as being the most powerful engine of the Monster Truck category.
Cublic cpapcity 3.497 cc Bore 16.27 mm Stroke 16.75 mm R.P.M 34000 rpm Power 2.5 hp Weight 350 g Zoom View Exploded View Instruction