Last summer I bought a Canadian Tire Mini
keep up with the kids. It worked very well with it’s one speed automatic
tiller motor. I put lots of miles on it in the driveway, but got
tired of my son (6 years old) smiling at me as he was going by me
on his Yamaha PW 50 cc dirt bike. Some excitement was missing as
I was wanting something to shift though the gears for more thrills.
So I bought a 125cc GIO motor 4 speed standard shift. Now we’re talking.
All I had to do was figure out how to install it. Not being the smartest
one in school (always sat at the back) I sat and looked at this little
bike for about 3 days before the light bulb went on. Now with my
plan forumulated, I forged onward, taking about 10 hours to complete
the required modifications for the installation of the new motor.
I must say that I’m quite pleased with how it works and has a very
nice sound to it. Now it’s my turn to smile as I go by. Of course
this will be short lived as I just bought him a bigger dirt bike
for his birthday and of course a 4 speed. Now where can I get a bigger
motor. haha. Hope you enjoy.
Candian Tire Mini Baja before I chopped
Notice chain Tensioner between the two
front engine sprockets. You will see that tensioner again.
Motor out. Notice Harley Davidson Floorboards
lower two inches for comfort..
Motor mounts welded in top and back frame
GIO 125cc motor. Also you can see two 1"
holes I cut into the lower frame plate so I could change the oil
and the other hole is to allow me to adjust the cam chain.
Carb on and wiring done. You will also see a couple small brackets
I welded on to hold the ingition coil and CDI box.
Head pipe and muffler on. Kick start has not had the specail bend
put in it yet.
Trying to figure out how to build the offset
In this pic you can see the chain and sprokets
are done. The rear sprocket has an inset of 3/8 of an inch. Notice
the chain tensioner. It came off the Tiller motor.
Notice key and Igintion switch on top of the handlebar clamps.
Notice snowmobile fuel pump. The gas tank
is lower then the Carburetor. You will notice a vacuum line in the
intake manifold just before where the carb bolts on. Had to drill
and thread a fitting for vacuum. The kick starter has a special bend
to it for clearing the back frame.
Lawn mower gas tank. Also notice chain
tensioner and offset front sprocket. The bolt in the center of the
front sprocket keeps it from moving up and down as it's offset by
over an inch. You can see the shifter has been lengthen for my big
feet (some would say clown feet, LOL).
Another look at the fuel pump on the backside of the lawn mower tank.