... , durable engine Strong power, Mature model Super classical 125CC off-road bike, GOL model motorcycle, SD125GY-T Engine Typevertical single ... -cylinder, air-cooled,four-strokeBore*Stroke56.5×49.5Compression ratio9.0:1Transmission5 gear, hand-clutchedEconomical Fuel ... as a professional motorcycle manufacturer. Super classical 125CC off-road bike, GOL model motorcycle, SD125GY-T