diygokarts.com ~ Building an Off Road Trail Mini Bike

Off Road Mini Bike Frame

Off Road Beast for Hunting

Since you're building this bike from scratch, you needn't follow the dimensions exactly as

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We suggest framing the mini bike from 1" tubing. You could certainly use common 3/4-in. pipe if you were so inclined. If you don't have a tube bender, you could join

Formed channel or a custom solution is needed for the frame base and transmission

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The uprights of the front fork section are also 1-in. furniture tubing or 3/4-in. pipe. The cross members, including the two pivot brackets, are angle iron. These are spaced so that the frame's steering column will seat snugly between them. The lock pin is then dropped through. This pin is 5/8-in.-dia. rod, with an L of 1/4-in. rod welded at the top. This hooks over the upper pivot bracket to keep the pin from dropping through to the ground. It also provides a handle to facilitate withdrawal, once the cotter pin at the opposite end has been removed. Unless you can lap this pin into the frame column for a snug fit, it should ride within bushings pressed into both ends of the column pipe. In the model shown, 5/8-in. I.D.  bushings were used.

Off Road Mini Bike Plans Section