1/4-28 pilot (SG) crankshaft for Centax type clutch Advanced Bi-Metallic Liner. This process uses a double layer of plating material rather than one thick layer. This helps metal to bond to cylinders and is more durable. Also, the plating process is more consistent, resulting in a more precise fit between piston and sleeve for better compression, longer life. Pull starter Two-needle 21F slide valve carburetor One-piece 8-fin Tornado cylinder head uses standard glow plug Rear exhaust Two year limited warranty

SPECS:
Displacement: 0.211 cu in (3.46cc)
Bore: 0.654" (16.6mm)
Stroke: 0.63" (16.0mm)
Practical RPM: 3,000 - 36,000 RPM
Power Output: 2.0 ps / 30,000 RPM
Weight: 13.9oz (395g)
Distance Between Mounting Holes Same Side: 0.83" (21mm)
Distance Between Mounting Holes Opposite Side: 1.4" (37mm)
Height Bottom of Mounting Tabs/Top of Cylinder Head: 3.4" (87.4mm)
Width of Mounting Tabs: 1.8" (45mm)
Distance from Pull Starter to Front Bearing: 3.2" (82.5mm)
Distance from Center of Engine to Front Bearing: 1.7" (44mm)
Distance from Center of Engine to Pull Starter: 1.5" (38.5mm)

Some notes on Slide Valve and Rotary Carburetors: Rotary Carbs offer a larger response in the middle of the power band. This works well for off-road applications when throttle response must be varied. Slide Valve Carbs provide 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.