Materials:
- brush cutter;
- Sheet steel;
- profile pipe 20x20 mm;
- driven and driven bicycle stars;
- roller chain;
- bearings of different sizes;
- steel pipes 20 mm, 32 mm and 50 mm.
Motor installation process
Remove the left pedal from the bicycle.
A platform for mounting the engine is welded from sheet steel and screwed to the bicycle frame. Eyes are made on it with holes for standard bolts for fastening the gas tank so that the motor shaft comes out on the opposite side of the cassette with the drive sprockets.
To securely fasten the plate, you need to tie it to the top of the frame.To do this, a U-shaped arc is welded from 3 pieces of profile pipe.
It is welded to the plate at the bottom, and to the bicycle frame at the top to a clamped homemade pipe clamp.
This way, nothing is welded to the bike itself. The bend of the arc should allow the engine to be installed without obstruction.
Next, install the motor without a rod with a short-cut shaft.
A piece of strip for attaching the tank is welded to the plate. It is advisable to place the tank so that the filler neck is higher and it is convenient to pour fuel into it.
2 bearings are installed on the motor shaft and pressed with a clamp to secure the rod. This will remove its play at speed.
Then a drive sprocket from an old bicycle is welded onto the shaft.
The driven star is welded onto a pin screwed in instead of the left pedal. The right pedal is also removed.
The stars are connected by a chain. To tension them, a roller is screwed to the bicycle frame. It is a long pin with two bearings on which a steel pipe is mounted.
Then, instead of the rear axle mounting nuts, tubes with nuts welded or pressed into the ends are screwed in. This will allow you to simultaneously hold the wheel and create supports for your feet, since there will be no pedals on the bicycle.
The throttle handle from the engine can be secured with clamps in a convenient place on the steering wheel. Before testing, it is imperative to check the brakes and, if necessary, replace them, since the load on them will increase when driving with a motor.
