GP GPX Demon 150GN User manual

Introduction
Congratulations to the new GPX Owner! GP Motor (Thailand) Co., Ltd. would like to thank you for
your trust in purchasing this motorcycle. With our sophisticated engineering innovation, GPX Demon
150GN is finely crafted to be one of the decent motorcycles one can desire for. The design is aimed for it
to be a handy, economy and easy to use motorbike, nevertheless safety and efficiency come as its true
ultimate.
Please study this owner’s manual in order for you to enjoy all the advantages of the vehicle. This
manual also gives you the basic instructions on how to operate, keep proper care of your bike including
trouble-shooting tips. For further questions and helps please contact any GPX dealers near you.
Yours sincerely,
GP Motor (Thailand) Co., Ltd.

Contents
-Safety Riding
4
-General Information
7
Parts Location
7
Chassis Number/Engine Serial
Number
11
Ignition Key
Fuel Tank Cap
12
13
-Starting Engine
14
Fuel Tank Valve
15
Starter Lever (CHOKE)
16
-Start Riding
17
Taking Off
17
Shifting Gear
18
Brakes
20

Contents
-Inspection and Adjustment
21
Maintenance and Service
21
Engine Oil
22
Spark Plug
23
Maintenance and Adjustment
24
Air Filter
25
Battery
26
Brakes
27
Clutch
29
Drive Chain
30
Tires
31
Speedometer Setting
32
Cleaning
33
Motorcycle Care for Long Storage
38
Specifications
41

Safety to Riding
Instructions for Safe Ride
Perform pre-operation check each time you use the vehicle to make sure it is in safe condition.
Always wear safety helmet, goggles, gloves and boots to help minimize the road accidents.
This motorcycle is not designed to come with any shield to protect your body from crashing in an
accident, therefore wearing the right gear could save your life. However they must be comfortably well-
fitted and not obstructing your visions and moves that can lead to accidents.
Always signal and look thoroughly before changing lanes. Do not rely only on the side mirrors but also
evaluate the speed and distance of other vehicles.
Downshifting when riding up and down steep slopes to save fuel and keep the engine from surging at
high revs.
4

Use both front and rear brakes at the same time together for safer stop. Using one brake with too
much force could make you lose control.
Riding on the wet road, maintain your steady speed and use less the brakes.
Riding down the hilly terrain, fully release the throttle to reduce speed and use both brakes
simultaneously.
If you have a sudden urge to speed up while riding, downshifting gear to get full response of the engine
for power to accelerate.
Riding at an appropriate speed and avoid excessive speed for a safety ride, fuel economy and keeping
your motorbike to last.
Be more careful when riding on the wet and slippery road. Reduce speed and keep control, avoid
sudden turning and braking.
5

Do not use low gear at the high speed or high rpm to avoid causing damage to the engine.
At all time of riding your hands must be holding the handlebars and your feet are firmly on the pegs.
Above rules are mandatory and need to be followed strictly for your safety, as well to keep the vehicle
at its best performance and last longer.
6

General Information
Parts Location
1) Mirror
2) Clutch Lever
3) Speedometer
4) Hand Brake
5) Right Hand Switch
6) Left Hand Switch
7) Ignition Switch Key
8) Fuel Tank Cap
9) USB Port
7

General Information
Odometer
1) High Beam
2) Neutral Gear Light
3) Indicator
4) Tachometer
5) Fuel Gauge
6) Speedometer
7) Gear Position Light
8

General Information
Left Handlebar
1) Clutch
2) Lights High/Low Beam
3) Indicators
4) Horn
Right Handlebar
1) Engine Kill Switch
2) Ignition Switch
9

1. Main Head Light
6. Rear Drum Brake
2. Mirror
7. Engine
3. Seat
8. Front Brake Disc
4. Tail/Brake Light
9. Fuel Tank
5. Muffler
10. Fairing
10

Chassis Number / Engine Serial Number
1. Chassis identification code number is
embossed on the right side of the steering
neck (A).
2. Engine serial code number is embossed on
the right side of the gear lever pedal (B).
11

Ignition Key
Ignition
Ignition key switches in 2 ways, i.e. LOCK, OFF and ON
A. Key Slot
B. ON Position
C. OFF Position
D. Steering LOCK Position
12

Fuel Tank Cap
Opening - Lift the Key Lid
- insert the key and turn clockwise
- Lift the fuel cap
Closing - Push the cap down
- Pull off the key
Seat Lock is located behind the rider
(A) Seat Lock
13

Starting the Engine
There are 2 ways to start the engine
1. Starting at neutral position
2. Starting at gear shifted
- switch ignition to ON
- switch to Position
- squeeze and hold the clutch lever
- push the start button
14

Starting the Engine
Fuel Valve
The valve can be switched in 3 ways, which are OFF, ON and RES
At a normal use, the valve is at the ON position (B). When the fuel runs out, you can switch the valve
to RES (D) position to use the reserved fuel which has about 1 litre in.
A. Fuel Valve
B. ON Position
C. OFF Position
D. RES Position
15

Cold Engine Starting
Using the Choke to help Start Cold Engine
-Pull the choke knob towards you
-Turn the engine on as usual
-Allow the engine to warm up until ready (at about 60ᵒC)
-Push the choke knob back to position
-You are good to go
Pull choke towards you
16

Riding
Taking Off
Kick up the stand
Squeeze clutch (A)
Shift to first gear (tap down the shifter once)
Gently and slightly twist the throttle until the bike begins to move forward
17

Riding
Shifting Gear
This motorcycle is designed to come with 5 gear speeds. The gear pattern starts with tapping one down
for the 1st gear, pulling up for higher shifts and tapping down for lower shifts.
1st gear : pull the clutch towards you (A), at the same
time shift into 1st gear by tapping downwards once on
the shifter. Release your foot when the gear is in
position.
Next gears : squeeze the clutch and move the gear
shifts upwards to upshift the remaining gears and
release your foot when complete, to permit it to reset
for the next shift.
Shifting to Neutral (N) : squeeze the clutch, kick the
shifter down once to get to 1st gear and kick up very
softly once to get to the Neutral (N).
Caution : Always use the clutch when changing gears for smooth shifting.
18

Riding
Speed to Shifting
Gear Position
Speed
KM/Hr
1st
10-20
2nd
20-40
3rd
40-60
4th
60-70
5th
70-120
19

Riding
Braking
Close the throttle completely without using the clutch
(unless you need to shift gear) to help slowdown the
engine.
Gradually downshift until you are in the 1st gear and
the bike stops.
Use both front brake (A) and rear brake (B) together
Do not grab harshly at the brake, your front wheel will
lock very easily and this cause you to skid out of
control. Slowdown when you want to make turnings.
In case of emergency stop : apply the right pressure to
the brake, try to keep control and downshift the gears.
20