Hyper .21 Engine,8-Port PS R

Key Features
Oversized flow-through Purple anodized cylinder head
ABC construction (Aluminum piston with a Chromed Brass cylinder)
Rear exhaust
Ball bearing-supported crankshaft
Slide Valve Carburetor for greater response at the beginning and end of the power band. This works well for on-road and racing applications for fast take-offs and high speed.
Needle valve adjusted by a screwdriver
Pilot shaft

Specs
Displacement: 3.49cc (.21 cubic inches)
Bore: 16.26mm Stroke: 16.8mm
Weight: 350g (12.3oz)
Length: 85mm (3.355") front of front bearing to back of pull start 120mm (4.72") pull start to end of crankshaft
Width: 31mm (1.21") width neglecting the mounting flanges 21mm (.83") mounting holes same side 37mm (1.5") mounting holes opposite side
Height: 113mm (4.428") from bottom of crankcase to top of cylinder head 16mm (.63") distance from bottom of mounting flanges to bottom of crankcase