I’m Max and this is installation of motorized bicycle kit
Here is 80cc 2-stroke engine with automatic clutch
Before installing the engine we made gas tank in the frame by welding the cap
I start with rear sprocket
It’s necessary to remove rear wheel and coster
Kit includes sprocket, rubber gaskets and brackets
One gasket is cut to be set from inside
First put on the sprocket with the outside gasket
Inside diameter of the sprocket was increased to fit OEM hub
It’s not easy to put on the inside gasket
Brackets are installed to cover the cut of the gasket
The nuts are tightened around in several approaches to provide a uniform tension
Next install the rear wheel and balance the sprocket
Determine the point of external deviation and tighten nuts in this section
In just a few approaches you can achieve a good balancing
Engine should be located as low as possible because it’s cruiser bike
Standart mount for under seat tube fits well
Mount for lower tube was made from standard plate and clamp 42mm
Studs were cut not to bulge
Engine should not touch the chain
Nuts are tightened around for several approaches
In this case chain cover is not necessary
Right pedal was lengthened not to touch the engine cover
We welded a rod in the pedal rake
Next install the chain
Remove front sprocket cover
Put on the chain and determine the length with normal tension
Add one more link if chain is connected with different plates
Remove extra links by knocking the pin
The open-loop part of clip link should be behind in the course of the chain
Standart chain tensioner is replaced with custom one
It has better look and it’s more compact
Exhaust has wrong tilt angle
Heat it to bend
Do not bend it on the engine - you can break the mounts
Also exhaust should be cut
Cut canister, rod and tube with the same length
In this case I cut 3cm
Here is the engine with exhaust
Ignition coil should be installed under the engine but for the first test drive I temporarily attached it to the tube
It is difficult to make a mistake connecting the wires - there are only two
Spark plug’s wire should not touch the engine
Attach throttle cable to carburator
Assembling is carried out in the following order
Carburator is fixed with the clamp and should be in vertical position
It’s necessary to drill the hole in the handlebar to install throttle assembly
Standart plastic throttle assembly is bad quality so it will be changed by CNC one
There is a stop engine button which should be connected with ignition coil’s wires
Next install clutch cable
There is a rack with the hole on the engine through which it must pass
Removable lug allows to adjust cable tension
Clutch lever should have a small free play
Gas tank is attached to carburetor through a fuel filter
Subscribe if information was interesting and watch first test drive!