GPX Demon 150GR Reference 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 150GR 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
11
Number
Ignition Key
12
Fuel Tank Cap
13
-
Starting Engine
14
Gasoline
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
7

General Information
Gauge
1.) Left turning light 6.) Battery light 11.) MODE 16.) Adjust light
2.) temperature 7.) Clock 12.) Speed meter 17.) Cooling system
3.) Neutral gear light (N) 8.) Right turning light 13.) ADJ light
4.) High beam warning light 9.) Round per minute (rpm) 14.) Odometer
5.) Engine problem light 10.) Fuel lever 15.) Gear position
8

General Information
Left Handlebar
1) Signal light
2) Lights High/Low Beam
3) Turning light switch
4) Horn
Right Handlebar
1) Engine Kill Switch
2) Hazard light switch
3) Ignition Switch
9

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

Chassis Number / Engine Serial Number
11

Ignition Key
Ignition
Ignition key switches in 3 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 under the piler seat
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
•Switch ignition to ON
•Switch position
•Squeeze and hold the clutch lever
•Push the start button

Starting the Engine
Gasoline
Gasoline use
•Only Gasohol Octane 91, 95 or Benzine
•Don’t fill to much fuel it will cause leaking
•For better use of EFI must keep the fuel level above 2 Liter
15

Starting Engine
1.) Should start the engine after the key was used for 10 second or when you see the fuel
pump stop working
2.) Engine warning light will be turn of when you start the engine
16

Riding
Taking Off
17
•Kick up the stand
•Start the Engine
•Squeeze clutch A
•Shift to the first fear (Tap down the shifter once)
•Gently and slightly twist the throttle until the bike
begins to move forward

Riding
Shifting Gear
This motorcycle is designed to come with 6 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
•1st gear: pull the clutch towards you (A), at the same
time shift into 1st gear by tapping down wards 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).

Riding
Speed to Shifting
Gear Position
Speed
KM/Hr.
1st
10-20
2
nd
20-40
3rd
40-60
4th
60-70
5th
70-80
6
th
More than 80
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
•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