Earlier, Me and my friends were thinking of making a Dirt bike from an 80cc Scrap engine from Bajaj and now we finalized the design.
Now I am going to give you a brief of what we did to create this beast.
Dirt Bike Chassis Selection:
At first, we took a Bajaj M80 Chassis and removed the back part of it.
We only had the front part and welded it to a metal seat. We bought dirt tires and fitted them for a good Off-Road Grip.
Then we took rear suspension from a bike called Pulsar 180.
Dirt Bike Engine Tuning :
Then, we have to fabricate the doom and side kits. For that, we went to a fabricator in
pudhupettai with our design and we painted it with the colors red and white.
Then, we entirely dismantled the engine for a complete refurbishes for
good performance on our dirt bike. Anyways it was a scrap engine so it needs
things inside it to be completely changed and lubricated. For a dirt bike in a
80 cc initial power is must so we changed pickup coil and assembled the engine
and installed chain connecting the engine with the back wheel for power transmission.
The engine is ready to install in the dirt bike and we installed it. In
M80 the gear system will be in the hand so for a dirt bike we need to change
the gear system to foot, so that it will be easy for the driver to operate. Then
we Shifted the gear system to foot and took for a test drive and everything
seems to be fine.
Everything was going as we planned, installed the doom and side
fabricated parts to the dirt bike.
After installing, we did not believe that the outcome will be as good as
this. Next, we tested the performance on the road, first, the outcome power was
good as we got a maximum speed of 75km/hr.
Braking System :
A brake is a mechanical device that slows or stops motion. The purpose
of the braking system is to increase locking all the wheels in the shortest possible
period.
We aimed to design a braking system which is easy to operate and light
in weight. Hydraulically actuated disc brakes have been used. A disc as well as the calliper of APACHE RTR 180 is used. Cutting brakes with the hand-operated the master cylinder has been employed at rear wheels to augment efficiency and
safety of the vehicle by:
1) Increasing the steering efficiency at corners by locking a single
wheel by using cutting brakes.
2) Moving our vehicle out from the situation when one of the wheels is
slipping and the whole power is being transferred to the slipping wheel so by
locking that wheel we can transfer the power to the wheel in contact with the
ground.
Disc brakes of Apache RTR180 were used due to their small size which can
easily fit in the rim. Also, disc brakes of APACHE are of petal-type which
makes them more efficient.
Bike Other Specification :
ENGINE:
Layout - single cylinder, Air-cooled, Two-stroke
Displacement - 80..00cc (5.00 cubic inches)
Fuel system - Carburetor
GEARBOX AND FINAL DRVIE:
Type - Manual
Transmission type - Chain
CHASSIS AND SUSPENSION:
Frame - BAJAJ M80
Front suspension - BAJAJ M80
Rear suspension - PULSAR 180
BRAKES:
Front - Disc
Rear - Drum
WHEELS AND TYRES:
Wheel type - Spokes
Wheel size(Front/Rear)- 16 inch diameter
Tire - Tube
Wheelbase - 900mm
Overall length - 1500mm
Height - 900mm
Ground clearance - 160mm
Weight - 75 kg
Overall width - 600mm
Starter - kick
Fuel capacity - 5 liters
Top speed - 60 km/hr
Finally, we completed building an 80cc Dirt Bike. Then one day suddenly
we received a pamphlet regarding there is a race called Dirt Bike which is
happening intercollege. So we planned to participate in that competition with
the dirt bike we created.
This
was the image of our dirt bike we took on that day before the race. And Comparision of original M80 Bike Vs Our Dirt Bike Hereby, I have
attached a video link to watch highlights of our first race.
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