50cc/70cc/90cc/110cc Single cylinder,4 stroke, air cooled, upper-laid motor front & rear tyre: 10" 50cc/70cc/90cc/110cc Single cylinder,4 stroke, air cooled, upper-laid motorModel No: QW-DB-03AEngine: 50cc, Single cylinder,4 stroke, air cooled, upper-laid motorDisplacement: 49.5mlBore * stroke: 39x41.4Compression ratio: 9.0:1Start: Electric / KickIgnition: CDITransmission: ChainClutch: ...