Friends, hello to everyone!
This time I decided to make a scooter powered by a gasoline trimmer engine. The front wheel is 20" from a bicycle, the rear is 3.00x4" from a cargo cart. The frame is made of pipes with a section of 30x20 mm. I also used a special grafting plate for a trimmer with a drive sprocket. Brake system based on brake caliper from bicycle. The brake disc is self-made from sheet metal with a thickness of 2 mm. The transitional design from the trimmer to the frame has already been done before, you can see it at this link    • Trimmer Bike, how to build it yoursel...  
I laid an OSB sheet on the frame, fastened it with furniture bolts.
I laid the brake and gas cables.
The weather is good, it's time for tests.
You will see what happened in the video.
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How to make a motorized scooter yourself