Bi-metal sleeve aluminum alloy piston/chrome plating provides longer wear
ROAR legal
5.4mm slide valve carburetor with two needle adjustment, multi- position high speed needle fits most cars on the market
Three-port cylinder sleeve
Dual bushing connecting rod
Rear exhaust

Specs:
Displacement: .12 cu in (2.09cc)
Maximum RPM: 46,000
Bore: 13.76mm
Stroke: 14.00mm
Weight: 7.6oz (220g)
Distance Between Mounting Holes Same Side: 11.08mm (0.436")
Distance Between Mounting Holes Opposite Side: 32.15mm (1.265")
Height Bottom of Mounting Tabs/Top of Cylinder Head: 75.89mm (2.98")
Width of Mounting Tabs: 38.53mm (1.517")
Distance from Back Plate to Front Bearing: 50.05mm (1.97")
Distance from Center of Engine to Front Bearing: 25.02mm (0.985")
Distance from Center of Engine to Back Plate: 25.02mm (0.985")