DIY Weld Together Mini Bike Frame Kit. Follow detailed instructions and weld your own frame together.  Then, customize it to however you like. Made with 1" cold rolled .095" wall steel tubing with 7/8" handles. You can also easily convert this to a trike as well with a longer axle and exra wheel. Approximate size after assembled 54" from rear of frame to the bottom of the forks. 28" from the bottom of frame to the top of the handle bars. Choose the option below for straight or bent forward upper fork.  Axle hanger option choose between 1" or 1.25" axle hanger option. Engine mount plate option choose between big block or small block mounting plate.