Bike: Mountain Bike
Engine size: 66cc China Girl
Drive type: Chain, 36T sprocket
Load weight: Around 155 lbs / 70kg
Terrain: hilly, flat, bridges, all asphalt/concrete
Average speed: 45 kph / 28 mph (flat) and 29 kph / 18 mph uphill.
Max speed: 58 kph / 36 mph
My 'idling speed' (where it will put along with no throttle at all on flat ground) is around 30-33 kph/18-20 mph.
I have had it to 68.9 kph / 42.etc mph coming down the bridge, but that's where the bike itself began a speed-wobble beneath me, so I had to cut the throttle and let it settle down a bit.