1/5 scale gas rc car, 4wd off-road gas powered rc car rc racing car - Thunderbolt,with 28cc engine,gas powered rc car FEATURES Massive 22mm aluminum shock body and independent suspension Steel differential gear set and transmission gear Full metal gear 15kg servo High efficiency shaft drive style 4wd system 28cc GASOLINE ENGINE Full ball bearing system High capacity 600cc fuel tank Front universal shaft included rc racing car TECHNICAL DATA Length: 700mm Width: 460mm Height: 286mm Wheelbase: 520mm Tread(F/R): 458mm/460mm Wheel Diameter: 172mm*80mm Gear Rate: 8.4:1 Weight: 12KG Engine: 28cc 2-Channel transsion system The servo must be set at the neutral position before assembly. Firstly, turn on the transmitter and receiver in succession; then pull the trim tabs to the neutral position, and turn off the receiver and transmitter, the servo will be at neutral position.