A motorcycle with stylistic or structural changes to the standard mass-produced machine offered by major manufacturers. Custom motorcycles might be unique, or built in limited quantities. Motorcycle often called a bike, motorbike, or cycle is a two or three wheeled motor vehicle. Motorcycle design varies greatly to suit a range of different purposes: long distance travel, commuting, cruising, sport including racing, and off-road riding. Motorcycling is riding a motorcycle and related social activity such as joining a motorcycle club and attending motorcycle rallies. Street bikes include cruisers, sport bikes, scooters and mopeds, and many other types. Off-road motorcycles include many types designed for dirt-oriented racing classes such as motocross and are not street legal in most areas. Dual purpose machines like the dual-sport style are made to go off-road but include features to make them legal and comfortable on the street as well. Each configuration offers either specialized advantage or broad capability, and each design creates a different riding posture.There are three major types of motorcycle street, off-road, and dual purpose. Within these types, there are many sub-types of motorcycles for different purposes. There is often a racing counterpart to each type, such as road racing and street bikes, or motocross and dirt bikes.Before we expand on classic motorcycle modification, you should first know a little about the traditional motorcycle. The motorcycle is a two-wheeled, single-track motor vehicle. It is one of the most affordable forms of motorized transportation in the world. The motorcycle is typically mass produced in a factory and has a standard steel or aluminum frame with forks holding the front wheel. It contains an engine and a whole array of parts such as brakes, fenders, and transmission and exhaust systems. Using classic motorcycle can indicate more than just the age of a motorcycle. In some cases, it's even used to describe a new motorcycle that has a certain look or style the so called classic that has the simplicity of an older vehicle. So when does a motorcycle become a classic? There is a general consensus among motorcycle enthusiasts that any motorcycle over the age of 25 could be considered a classic, but some also base their definition on the bike's appearance or design. And no matter how old your motorcycle is, you still need to get a motorcycle license and get insured before you hit the road. But the most important things to remember about your motorcycle whether it's classic, vintage, antique or historical are to be safe and enjoy the ride.