Chain saw motor to build the bike we have an old chain saw lying around and an old bicycle .. and since I came to the idea to install the motor to the bike. I have thought to replace the “gas button” for an Ebay mofa/moped gas train and to mount to the handlebar.. if that does not work, then just place the button on the handlebar. Gear and clutch? I would unscrew the pedals completely and attach a sheet with punched on one side, on which of the Motor comes. Connecting the engine with a pinned rod (to the emergency rear axle of “baby bike) to the front pinion I thought about taking out the middle pinion in the rear of the bike ( 3 gears) and drilling the hole in the middle bigger. So that if I start the engine and it is set to the 2nd gear, the pinion goes through and the machine stops. As soon as I then switch into the first gear I would have to have a good acceleration. a certain speed is reached (by pressing the gas button) then is switched to the larger sniper. What do you think of it? Do you have suggestions for improvement? Has any of you ever built such a thing or something similar? (vlt go cart or something?)