O.S. .21VZ-R (P)-T Ver.2 w/20K Slide Carb

An improved internal crankcase core and re-shaped liner port for better mixture flow A button-shaped inner head design to boost high-end rpm A piston machined from bar stock for more strength More crankcase webbing helps the engine cool better and adds structural strength Rear exhaust port is cast as part of the cylinder to improve exhaust flow 2-piece turbocylinder head is designed specifically to work with the new high-performance T-P7 Turbo Plug Oversized blue anodized cylinder head for more cooling True ABC construction (Aluminum Piston with a Chromed Brass Cylinder) reduces break-in time. The lightened piston improves cooling and acceleration. Con rod has lighter, more durable bushing material Universal fuel inlet nipple can be repositioned for better access Needle valve assembly is encased in a protective sleeve Dual crankshaft bearings. Full linear action of a 20K Slide Valve Carb, for more consistent throttle response throughout the RPM range Carburetor stop valve prevents the rotor from sliding too far Crankcase backplate has an O-ring for a better seal Pilot shaft crankshaft

Specs:
placement: 3.5cc (.211 cu in)
Bore: 16.6mm (.654")
Stroke: 16.0mm (.630")
Power Output: 2.5 BHP at 34,000 RPM
Practical RPM Range: 3,000 - 42,000 RPM
Crankshaft Thread Size: 1/4-28
Weight: 315.5g (11.1oz)
Mounting Dimensions:
Distance between mounting holes on same side: 0.83" (21mm)
Distance between mounting holes on opposite side: 1.46" (37mm)
Width of engine at cylinder head: 1.95 (49.6mm)
Width of crankcase neglecting mounting flanges: 1.21" (30.8mm)
Width of crankcase with mounting flanges: 1.77" (45mm)
Length from center of engine to end of crankshaft: 2.89" (73.5mm)
Height/crankcase bottom to top of cylinder head: 3.9" (99.5mm)
Height/bottom of mounting ears/top of cylinder head: 3.3" (84mm)