A motorcycle, also known as a moped, bike, scooter, or motorcycle, is typically a two-wheeled motorcycle designed to travel on roads. Motorcycle style changes greatly to fit a wide range of purposes: commuting, long distance travel, sport, touring, and even off-road racing. In most developed countries, motorcycles are considered to be a luxury item. In other countries, a motorcycle is viewed as a primary means of transportation. In the United States, however, there are many bike riders who commute to work in metropolitan areas, due to the close proximity of urban centers.
Motorcycle enthusiasts, or “motorcyclists” are becoming more popular. There are an estimated 125 million motorcycles in North America alone. The number of motorcycle owners and drivers has increased in recent years with the availability of higher-end motorcycles and sport bikes on the market. Many younger motorcycle riders start riding their parent’s motorcycle when they are about twelve years old, but most motorcycle riders begin with a much smaller, lighter, less powerful vehicle such as a sport bike or an older version of a motorcycle.
Most motorcycles have a front wheel drive and a choice between either a front hand drive or a rear wheel drive suspension system. In most cases, front wheel drive suspension systems use a disk brake system, which utilizes a disc placed above the pivot point between the front and rear wheels. This disk brakes on the front wheel by compressing the spring-loaded pistons in the brake calipers. Backside stroke forces the disk brake mechanism to apply pressure to the back tire. Both systems have their advantages and disadvantages.
The most popular type of motorcycle suspension, front wheel drive, uses the standard piston system. The piston is mounted in the center of the strut bar and uses hydraulic pressure from the pinion spring to compress the disks that are mounted above the pivot point. The advantage of this system is that it can provide smooth and reliable braking over longer distances, however it has very limited maneuverability. A disadvantage of this system is that the disks often do not wear evenly and can break at places that are not installed properly. The strut bars can also break at high speeds, which can be extremely dangerous for inexperienced riders.
When a rider goes up a hill, the typical bicycle has one tire on the left (the rear wheel) and one tire on the right (the front wheel). The left (rear tire) is usually on a softer surface than the right (front tire) to allow for improved handling. As the rear tire wears more, the rear cylinder of the bicycle increases in size and diameter to match the increase in height of the bicycle, therefore the right rear cylinder will also wear faster than the left. When the right rear cylinder wears out faster than the left, the rear wheel will be forced to brake to a greater extent than necessary to slow the bike down, causing the bike to overshoot the ideal angle for the handlebars. This results in excessive wear of both tires.
The advertising system is similar to this example. The manufacturer advertises that his product is designed for a particular user with this specification. A disadvantage is that the disadvantageous product may not work correctly or may not work at all. A potential benefit can also be missed because a rider who uses that particular product may not be aware that it exists.