examples of motorcycles [2]
off-road motorcycle 
Motorcycle designed for traveling over rough terrain, with features such as a raised engine, extended suspension, elevated muffler and tires with studs.
telescopic front fork 
Pair of sliding tubes enclosing a spring; it controls steering, suspension and shock absorption on the front wheel.
seat 
Usually leather seat where the driver sits.
knobby tread tire 
Tire whose tread is fitted with blocks of rubber, providing better traction on rough terrain.