The minibike you can do the following modifications on is a mini Baja 6.5 hp from Canadian Tire. Do you own one of these bikes and wish you could keep up to a real dirt bike? With these few minor modifications your minibike can be doing speeds of over 70 mph (110 km/h).

Steps

1Take off the rear fender, headlight, mock gas tank, and the clutch and chain cover.

2Go to your local TSC store or farming supplies store and buy #40 or #41 roller chain.

3Remove the two chains’ master links, using a flat screwdriver or needle-nosed pliers.

4Remove clutch by taking off the snap ring and loosening off the bolt. Slide the clutch off the engine shaft.

5Remove the gear reduction on the motor by removing the bolts that hold it to the block.

6Put the clutch back on, only this time with the sprocket facing the motor.

7Take the new chain and put it around the two sprockets so the end and the middle of the chain are touching on the back sprocket.

8Using a chain breaker or a hammer and nail set, remove the pin from where the chain needs to be cut.

9Attach the chain together with the included connecting or master link and tighten the chain.

10You can now reattach the clutch cover.

11Remove the throttle cable from its stock mounting spot and mount it to the arm under the gas tank or directly to the carburetor. This by-passes the governor, allowing your motor to rev higher and have more power.

12Unbolt the muffler baffle, unbolt the stock muffler and cut off the mounting flange with about an inch of tube left on it.

13Get a piece of pipe the same dimensions as what is left on the exhaust mounting flange. Cut the pipe so it is at the right angle that it will clear the motor components and the frame etc.

14Weld a piece of pipe that has the same wall thickness and fits over the other pipe with about 4 mm extra clearance.

15Center it on the pipe and weld it onto the pipe.

16Using a half inch round file smooth the inside of the pipes where they join together.

17Grind the end of the larger pipe off on an angle for appearance.

18Bolt the exhaust back on.

19Take off the stock air filter by removing the top wing nut and unscrew the air filter housing.

20Replace the air filter with a K & N style air filter or similar.