If you like to tinker, you might have occasion to take apart your moped. Mopeds are a particularly good source of entertainment and fun for many engine fanatics, as mopeds offer easy, forgiving engines for people to toy with. Since most mopeds are only one piston, moped engines are one of the easiest mechanical items to work on. If you feel uncomfortable around engine parts, though, bring your moped to a certified mechanic to have it taken apart.
Start taking apart your engine by first removing the carburettor. To do this, you need a wrench to remove it from the engine. Take the wrench, and remove the nut and bolt holding the carburettor to the gas intake, which is located on top of the engine. The carburettor should now be completely off of the engine.
Remove the engine cover on the side by unscrewing the four or so screws holding in the metal or plastic cover. Once this pops off, you will see the inner workings of the engine, which includes the piston, gaskets and engine block.
Take off the piston head by turning your pedals until the piston is at its farthest point, where you then will unscrew the two screws holding it onto the engine. It will pop right off the engine block.
Take off the throttle and brake cables by sticking your screwdriver underneath the handlebar throttle, and carefully sliding off the mechanism.
Remove the wheels and tires by unscrewing the nut and bolt holding in the wheel, located at the bottom of the front and back shocks. After you have removed the wheel, place your moped on its side to prevent damage to the shock absorbers.
Remove the handlebars by unscrewing the nut and bolt in the direct centre of the bars. This will need to be done after removing the brake and throttle cables, as those are also holding the handlebars in place.
Take the shocks off your moped by unscrewing the nut and bolt at the top of the shocks. These shocks will often be held together by one long bolt.
Take the magneto off your moped by removing the (usually) two screws holding the magneto in place. On some older models, the magneto is glued onto the frame. To remove this type of placement, you will need to use some sort of glue remover and wait for it to break down the glue molecules holding the magneto on.
Your bicycle will now be stripped down to the bare bones, and you can make adjustments to the frame, engine or wheels.
- If you find a screw that is especially stubborn, spray WD-40 on it to get it to screw off more easily.
- Use newspaper underneath your workplace so you don't get dirt or oil anywhere.
- Keep your items in a Ziploc bag, so you won't lose any of the smaller engine parts.