Mini bike frames vary depending on the bike’s purpose and size. Mini motocross frames are sturdy yet light, while mini chopper frames are beefy to absorb road vibration. Mini-moto frames mimic full-size street bikes and are lightweight for racing.
The mini bike frame that is purchased will depend entirely on the size, purpose, and structure of the bike that is being built. A mini motocross moto frame, for example, will have a different shape and weight than a mini street moto style frame. The mini-bike will have a different shape and weight than a frame made for a chopper bike, and all of these frames will be different from the mini-bike frame used for a quad. The frame design principles for a mini bike are quite similar to the frame design principles used in making full-size bikes; Mini bike frames are simply made on a much smaller scale.
A mini motocross frame will be designed to withstand constant and heavy impacts associated with the sport. Weld-ons are likely to be quite stout, though builders generally prefer to choose a frame that is fairly light as well, making jumping and quick turns possible. The frame design will be consistent with full-size motocross bikes; The head tube angle is likely to be quite lax to accommodate a long-travel fork, and the frame will come in two parts: the main triangle and the rear swingarm. The rear swingarm allows the suspension to be mounted to the rear of the bike, while also allowing the rear wheel to be attached to the frame. The swingarm is attached to the main triangle at a pivot point, which is usually made up of bushings and/or bushings.
A mini chopper bike frame will come in one piece in many cases, although some soft tail versions may be available. The mini chopper bike frame features a very slack head tube angle to accommodate the extremely relaxed riding position and the very long fork to be attached to the frame. The frame itself is likely to be quite beefy, especially if you don’t use rear suspension; the frame will have to absorb road vibration and sudden bumps.
A mini-moto frame will mimic the layout of full-size street bikes. The head tube angle won’t be as steep as the other types of mini bike frames, although the frame will almost certainly come in two pieces: the main triangle and the rear swingarm. The fork attached to a mini-moto will not sweep out at a large angle like motocross or chopper bikes; This helps in steering and aerodynamics. The frame will also be lightweight to make it appropriate for racing.
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