ATV frames are made from mild steel and chrome-moly tubing and can be modified for different types of racing, such as hill-climbing and sand drag racing. Modifications include engine placement, suspension attachment points, and height. Frames for motocross racing are wider and reinforced for landing shock. Chrome steel is commonly used for its strength and light weight.
All-terrain vehicle (ATV) frames can be made in several different configurations to support racing and performance vehicles, as well as hill-climbing and sand drag racing. Manufactured from mild steel and chrome-moly (chromoly) steel tubing, ATV frames are commonly based on a production style of frame. Modifications are made to the basic frame design to add better performance to the style of competition in which the ATV will be used. Length is a consideration for the average competition frame, and other typical modifications made to competition ATV frames center around engine placement, suspension attachment points, and height.
An ATV is most commonly seen in the four wheel version universally known as a quad. Although manufacturers and designers have spent a lot of time and money developing a good frame, racers often modify ATV frames to better suit a specific type and style of racing. When the ATV is intended for racing on paved surfaces, such as conventional drag racing, ATV frames are commonly designed to sit much closer to the pavement than a stock frame. The frame is commonly stretched and lengthened as well to promote better traction and aerodynamic tendencies. The motor mounts are also modified to allow different motor styles to be set in the frame for more power and speed.
However, if the machine will be competing in sand drag racing, ATV frames are generally designed to ride slightly higher off the ground to allow for the uneven height of the racetrack surface. Engine placement will generally be a bit closer to the rear wheels to offer better traction on soft surface. If an ATV is intended for hill-climbing competition, the frame is usually lengthened and center-weighted to promote superior climbing ability. These ATV frames are also routinely created to operate with a standard motorcycle front suspension instead of the ATV suspension that originally came on the machine.
The most frequently modified ATV frames take part in motocross racing events in both indoor and outdoor versions. These ATV frames are generally designed to be slightly wider to aid in cornering stability. Frames are usually stiffened and reinforced at suspension mounting points to absorb landing shock resulting from big jumps. Chrome steel is commonly used in all types of racing frames due to its light weight and superior strength compared to carbon steel frames.
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