How to Put a Chainsaw Motor on a Bicycle?


Chainsaw motors are very powerful and have been used in various appliances such as lawnmowers and scooters. The process might come out as an issue of advanced mechanics. But it’s not as hard it might look to mount the motor on the bike. With the right choice of engine and having the right knowledge about how and where to mount it, anyone can do it with much ease.

Today a good majority of motorized bicycles make use of a chainsaw or gas-powered engine.



Tools and Parts Required to Begin With

List of Tools:

  • Screwdriver
  • Drill and bits
  • Wrenches
  • Pliers
  • Welder

List of Parts:

  • Chainsaw
  • Bike
  • 1inx1in box steel (around 3 ft required)
  • 4inx4inx1/8in a metal plate
  • Bicycle brake lines and handle
  • Random bolts, nuts, and hose clamps
  • Bike axle peg
  • long spring to tension the engine to the bike tire. A bungee cord.
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The Drive “PEG” DRIVE “PEG”:

An axle peg from a BMX bike is recommended to use, it is often used to stand on and it sticks out from the side of the bike’s axle used to stand on or do tricks. After the clutch is fixed on the engine, it must be ensured that the nut is welded or bolted in the center being aligned as straight as possible with the peg. If that doesn’t happen it will result in wearing the crankshaft bearings very quickly. Due to the amount of vibration it has to face. Once this step is complete, the screw must be screwed on the top of the engine shaft.

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Making the Bracket to Hold the Engine:

After that, it’s time to take the stick of 1inx1in box steel and fix it on the end of the metal plate. Followed by it, drilling 2 holes into the plate that will hold the chainsaw bar on the saw. Now drill the holes for mounting of the bike frame and vertical bolt. After all, holes are drilled you can start bolting on the chainsaw motor and get it hooked to the bike frame.

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Throttle Linkage:

This is a tricky part and is advised here to use the old bike brake cable and brake handle. What should be looked for here is to see how far the brake cable travels on squeezing the handle. But one should be careful here as it can turn problematic if the saw’s throttle cable gets pulled too far resulting in breaking off the cable or worse. The best way to do this is by leaving some slack in the able, ensuring that the carb is set at wide-open throttle at the time when the brake is fully pressed.

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Tension and Friction Drive:

Once the engine is bolted to the bike, it should be under constant pressure that will push it down onto the engine so it can comfortably ride along the top of the tire. If that’s not the case it to result in slipping in of the drivetrain and slowing down of the bike. To ensure that this does not happen, it is recommended to use a spring of any type, as of now a bungee cord will get the job done. It is important to strike the right balance not too light and not too much as it can result in unneeded stress and quickly wear it out.

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Test and Tune Run:

The chainsaw engine must be tested before putting it on and once it is installed onto the bike it will work just fine. To get it a good start a choke set at 1/3 will be enough with a couple of pumps on the fuel primer. But to start, it needed to be at least at 6 to 10mph. It is so as the engine is required to be a specific RPM so that it can start with proficiency enough electricity so that it will be able to fire the spark plug.

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