Mini Quad 49cc, 2-stroke, air cooled seven color available Name:Mini QuadModel:CS-G9054Detail:Brake Front:Disc brake,twinBrake Rear:Disc ... .6 in)Bore Stroke:40mm×32mmCompression Ratio:10.0:1Engine:49cc, 2-stroke, air cooledFuel System:Fuel injectionIgnition:Electronic ignition (CDI ...