Mechanical aptitude is essential for successful installation.
Most 24" or 26" bicycle with diamond frame and a horizontal top
tube should have sufficient space to mount the engine
Step 1: The rear wheel sprocket shall be
Remove the rear wheel from the bicycle.
Remove the rear wheel sprocket
and associated mounting accessories from the bag
Slit one of the rubber washer as shown.
This is to allow the rubber washer to go around the rear
Insert the rubber washers as shown
Mount the sprocket to the rear wheel as shown.
Do not over-tighten and make sure that
the sprocket is exactly perpendicular to the axis of
Reinstall the rear wheel to bicycle.
Remove valve mechanism from the carburetor.
Insert throttle cable through screw cap. Insert spring return and
attached end of cable to valve plunger.
Line up the cable and spring.
Run cable down to engine; Replace above mechanism into the carburetor.
Next: The Engine:
The engine is designed to fit between the down tube
and the seat tube of a standard diamond frame bicycle. Other types
of bicycle may require slight modifications.
Position the engine so that when the exhaust silencer
is installed, it points towards the ground nearly parallel to
the down tube.
The exhaust silencer needs to be removed to tighten
the mounting nuts.
So when positioning the engine, there is no need to tighten the
exhaust silencer to the engine.
NOTE: If the bicycle frame tubing is too large then you will
have to use the bicycle frame adapter. (metal plate with 3 holes
in the same plastic bag there are 3 bolts; 2 that go into the
motor and one longer one that goes through the bike frame then
through the motor mount)
As shown on photos below:
Bicycle frame adapter
Insert the 2 shortst bolts
in to the motor
Bicycle frame adapter
installed to the engine
Place the engine on the bicycle frame as shown on photo.
Mark the area of the center hole of the bicycle frame
adapter, you will need to drill a hole through the
bike frame on that area.
The longer bolt goes through the bike frame
then through the motor mount)
on photos below:
NEXT: Chain drive:
Remove chain cover and
Break chain and feed into
drive sprocket on engine. Use box spanner provided to
crank chain around drive sprocket.
Remove excess chain and reconnect.
Install chain guide pulley.
Do not over-tension the chain.
Install chain guard and replace spark plug.
The CDI is part of the electronic ignition system for
Secure the CDI to the down tube as shown.
Connect the CDI cable to the spark plug and the 2 wires
to the magneto coil wires from the engine.
Install clutch lever under left handle brake lever.
Run cable down to engine.
Insert heat protective spring (bigger spring wire)
Insert cable through anchor pivot.
Insert spring return over clutch cable. Tighten cable
to clutch lever on engine, ensuring that slack just taken out.
The carburetor in the picture bellow was taken out for clarity.
The completed installation should look like this.
Remove existing right handle grip and replace with twist throttle.
Existing brake lever loosen and shifted to facilitate installation
of twist throttle.
Replace brake lever in its original position after installation of
the twist throttle.
Next: Fuel tank
Finally, mount the fuel tank over the top tube.
Tighten the fuel valve to the tank.
Cut supply fuel line to length and connect fuel
valve to carburetor.
Ready to go
Secure loose cables to frame of bicycle with cable tie (not done in
Fill fuel and lubricant mixture in accordance with recommendation
on the manual.
Compress the clutch and start cycling bike as normal. When sufficient
speed is reached, release the clutch. This will start the engine.
To stop, compress and engage the clutch lever. Brake as normal.
To stop the engine, choke the carburetor completely with the lever
on the carburetor. Alternatively, press the kill switch which is provided.
When engine is not running shut of fuel valve completely.
1.IMPORTANT: PLEASE READ THIS: Gas and Oil Mixture for
The engine is a 2 cycle design, therefore, a gasoline/oil mixture is
necessary. During the break-in period (1st gallon of fuel), the ratio
for 48cc is 25 parts gasoline to 1 part oil. Break in ratio for 80cc
is 20 to 1. After the break-in period, the ratio is increased to 30
to 35 parts gasoline to 1 part oil.
*NOTE: Use only Synthetic 2 Stroke Oil to insure proper engine lubrication.
!WARNING! Remember safety first:
Wipe up any spilled fuel. NEVER fuel a hot engine or smoke while fueling.
This could result in sudden fire, personal injury. Always move your
motorized bike at least 10 feet from any fueling area before attempting
to start it. Never leave the tank fuel cap off after fueling as rain
water will contaminate the fuel and cause engine failure.
2. Open the fuel valve. Small lever pointed down with fuel line is
in the open position.
3 Depress the small round cap plunger, ( Tickle button ), to prime
carburetor. Located on
left side of the carburetor next to the idle adjust screw. One or
two times is enough.
4. Lift choke lever to the upward position. This is the small lever
on the right side of the
carburetor. All the way Up the choke is on. All the way Down the choke
is off. Move
progressively downward to off position during engine warm up period.
5. Pull the handlebar clutch lever inward, to disengage the engine
from the rear wheel.
6. Pedal; (down hill if possible for first start)
7. Let out the clutch lever all the way out and continuing to pedal.
The result is a direct engine hook up with the rear wheel via chain
and sprocket and the engine will now start spinning, Pedal until motor
starts. Accelerate slowly at first.
8. Twist throttle to increase speed, reverse twist throttle to decrease
speed. To stop,
disengage clutch and apply brakes. To accelerate, pedal and release
9. Adjust choke to the smoothest engine running position.
10. After warm up push choke lever all the way down. If engine races
too fast, or too slow,
pull clutch lever and lock in the notched catch, stop and adjust engine
11. If the rpm needs adjusting, turn the idle adjust screw (left side
of carburetor) in or out
slowly to obtain the proper idle speed of about 1400 rpm +/- 100 rpm
To correctly break the engine in, Do not exceed 15 mph or 30 min.
for the first 50 miles during engine brake in. Engine will develop
more power after break in.
12. To stop the engine, push Kill switch and turn off gas valve at
tank. Turning off the gas will prevent fuel from being siphoned from
tank. Warning Note: Never leave the tank gas valve in “open” position”
when engine is not running or the bike is in storage.
13. After or before each ride check all mounting fasteners, including
hd. bolts, axle and brakes.
14. Warning Note: Engine lock up or piston seizure due to improper
gas / oil mixture will not be
covered by factory warranty. This the responsibility of the owner
/ operator to make sure the
gas and oil is mixed correctly.
frequently Asked Questions
Can I install the bicycle engine kit
on a mountain bike?
Yes, you can convert your regular mountain bike into a motorized bike.
Are parts available for the bicycle
Yes, parts are available as well as upgrade parts!
Does the bicycle motor kit comes with
everything I need to put on my bike?
Yes, this bicycle motor kit comes with absolutely everything you need
Do I need a driver license to ride a
In most states you don’t need a driver license to ride the motorized
bicycle, but the law are different in some states. We recommend that
you check in you state.
Does this bicycle engine kit fit all size bikes?
No, this type of bicycle motors kit was design for 26’inches bikes
and some24 inch frame size bikes.
Check back fore more information
By phone: 877-354-3733
From Monday to Friday 12:00pm to
8:30pm (Eastern Time)
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