It's a great way to encourage mechanical ability in your children. You'll both learn a vast amount about small engines. Even if you start with a new engine, the entire scooter can be built on the cheap.Ī simple mini bike is a great way to get you and your kids working together.
![diy mini bike kit free diy mini bike kit free](https://www.diygokarts.com/images/plans-offroad/mini-bike-back-200.jpg)
Most of the parts are stock bike or kart items, easy to come by and easy to assemble. boy's bicycle, which you can usually pick up for a few dollars at a bike shop or junk yard. The basic frame comes from a discarded 26-in. The best part is the machine's lightweight, low-cost design. And when you come to a hill, the torque convertor will automatically downshift to a lower drive ratio to give you rugged hill-climbing power. On flat ground this scrappy little mini bike can hit around 30 mph. Take a small kart engine, add a slick variable-ratio belt transmission and you'll have a real performance 'bear' for half the cost of a commercial motor scooter.
Diy mini bike kit free free#
We've also found a lot of good information on free mini bike plans at the DIY Go Karts website. There are two plans - the first uses a junked bicycle for parts, and the second is the super old-school traditional mini bike style. This mini bike is souped up with a torque convertor. Tack the threaded joints at the T's to prevent their twisting.Vintage, classic. Tack weld all joints to hold the assembly rigid, then remove the frame from the jig to complete the welding. For clean welds, remove the paint from all weld points. Shape the crossties as shown for a close fit inside the side rails. 5 & 6.įasten the front and reat forks to the blocks on the jib, and you are now ready for welding. As the legs pivot on the fork, they compress the spring, giving the front wheel a sof, cushiony suspension.
![diy mini bike kit free diy mini bike kit free](https://content.instructables.com/ORIG/FGH/TKN3/K4PAVJ4Z/FGHTKN3K4PAVJ4Z.jpg)
The upper ends of the legs, which now extend above the fork, are anchored to a spring that bears against a plate on the steering column. Bolt the legs to this stub fork as shown, with the spreader bar inserted between them. The spring-action front wheel is made by cutting the legs off a regular bike fork. The frame tubing should be pounded flat, and these inserted deep inside, then welded.
![diy mini bike kit free diy mini bike kit free](https://www.mfgsupply.com/media/catalog/product/cache/1/image/1000x/c1eafbadb87a261db73e07c2de8fe883/m/i/minifrm_1.gif)
The rear forks are made from 1/4" x 1" flat stock, as in fig. You may use threaded pipe as shown with the T's, or just weld it, which would be better. The lower part of the mini bike's frame is made from 1/2" pipe. Now make a simple welding jig from wood, as shown in fig. It become the rear support for the seat.Īfter bending the gooseneck forward, cut it and the seat post so that they are both 12.5" long as measured from the top bar. Remove the rear fork as shown, but don't throw it away. If you have any qualms about the safety of the frame, build you own or find a different donor to modify. If the tubing's strength is compromised at this step, you'll end up with a possibly dangerous bike later. Heating with a propane torch will make the job easier. Bend carefully to avoid flattening the tubing. This can be done with a large jack, as shown. It's probably necessary to bend the "gooseneck" section of the frame forward to make room for the engine. Start by cutting the bike frame so you come out with the portion shown in fig. No problem, simply use the diagrams as your basis. If you can't find this, you'll have to build the frame up from scratch. Preferably, find an old bike with a solid-feeling steel frame. You'll need to weld onto this frame, so aluminum is out. Finding a Suitable Frameįirst you'll need to find a bike frame that you can use successfuly for this project. Though at first this sounds odd, it's really a unique idea that will save you money, and provide pre-bent handlebars, and the bearing connection at the neck.
Diy mini bike kit free how to#
These plans will show you first how to convert a junked bicycle frame to become the base for your mini bike. Mini Bike Frame Design Convert a Bicycle, or Build Your Own