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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. 

 

Summary of Contents for GPX Demon 150GN

Page 1: ...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 a...

Page 2: ...neral 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...

Page 3: ...intenance 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 Ca...

Page 4: ...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...

Page 5: ...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...

Page 6: ...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...

Page 7: ...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...

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

Page 9: ...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...

Page 10: ...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...

Page 11: ...s 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 peda...

Page 12: ...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...

Page 13: ...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...

Page 14: ...g 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 bu...

Page 15: ...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...

Page 16: ...e 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 60 C Push the choke knob back to position You are good to...

Page 17: ...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...

Page 18: ...ar 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 you...

Page 19: ...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...

Page 20: ...ou 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 con...

Page 21: ...t brake performance 8 Swingarm Axel Fasten 9 Wheels Check alignment change if necessary 10 Wheel Bearings Fasten loosen or change if necessary 11 Steering Head Bearings Fasten loosen replace lubricant...

Page 22: ...ngine 2 Place the oil tray underneath the engine 3 Remove the drain bolt 24 A and washer 4 Remove the oil dip stick B 5 Allow the oil to drain completely with your bike in upright position 6 Refit the...

Page 23: ...Remove the spark plug cap B Unthread the plug using a wrench included in the owner s tool kit Thread and tighten the new plug in by reversing the removal steps Specified Spark Plug NGK D8EA Gap 0 6 0...

Page 24: ...rvals check as regular as specified in the maintenance schedule but before time if it doesn t work right you may try these Start the engine allow it to warm up a while Wait till rpm drop to idle speed...

Page 25: ...nd fuel economy and possibly deteriorates the spark plug Remarks Avoid storing things in the seat for better air flow Removing the Air Filter Remove the seat Remove the airbox case cover on the right...

Page 26: ...to check or add distilled water Removing Battery Remove the passenger s seat Remove the rider s seat Remove the rubber strap Remove the battery leads first the negative then the positive respectively...

Page 27: ...Fluid The fluid level must always be above the minimum mark A If you find the fluid is low as to hitting the bottom level B check the followings Check brake pads for wear change if necessary and the...

Page 28: ...nged Brake Fluid The fluid level must always be above the minimum mark If you find the fluid is low as to hitting the bottom level check the followings Check brake pads for wear change if necessary an...

Page 29: ...ifficult to shift gears and may even cause damage to gearbox Therefore it is necessary to have the clutch checked and adjusted per scheduled Turn the cable adjuster nut which is located on the right o...

Page 30: ...e Chain Checking the drive chain slack Place the bike on the side stand Push up and press down the midway point between the front and rear sprockets If the slack found too low adjust it to the 10 20 m...

Page 31: ...the tires air pressure up to the specification gets it the best traction and performance on the road Checking the pressure Unscrew the valve stem cap A Use tire pressure gauge to read the pressure Pre...

Page 32: ...ress the right button to choose the light color 2 Press and hold the right button to adjust the brightness Clock Setting 1 Go to TOTAL 2 Press and hold the left button until the numbers blink 3 Adjust...

Page 33: ...t The engine and muffler need to be really cold before you do washing Take extra care on seals brake pads and rubber parts from contacting grease Use no harsh cleaning agent and is friendly to the pai...

Page 34: ...hole fuel tank cap First rinse away the dust and remove dirts with water Mix the cleaning agent and water to the proportion use soft clean cloth or sponge to gently rub the bike Rince off with soft or...

Page 35: ...increases the corrosive action of the salt After a ride in the rain if condensation got in your headlight lens clean and dry your bike Run the engine and turn the headlight on to dry the moist Paint F...

Page 36: ...th motorcycle plastic care product Important Notes Using common home cleaner can easily damage the motorcycle s plastic parts e g benzene brake fluid glass cleaner thread locker etc If the plastic par...

Page 37: ...wheels coated or non coated use only the non acidic aluminium wheel cleaner to avoid damages Leather Vinyl and Rubber Parts If your motorcycle is equipped with leather use the leather cleaner Same to...

Page 38: ...ing apply where it does not make contact with the ground This may cause bad grip and loss of control Long time Storage Preparing your bike for long storage Clean your bike Start the engine for a while...

Page 39: ...ommonly gives amount of flammable vapours Store your bike in a well ventilated place switch the ignition key to OFF position Do not smoke and avoid generation of ignition sources Gasoline is hazardous...

Page 40: ...Long time Storage CAUTION Be careful Oil can squirt to your eye or face while injecting it in to the spark plug hole If this happens rinse with lots of water and rush to doctor to make sure it won t s...

Page 41: ...nder 1 Cooling System Air cooled Bore x Stroke 62 mm x 49 50 mm Produces Max Power 8 7 kw at 7 500 rpm Starting System Electric Starter Ignition System CDI Clutch Wet type Gear 5 speed Dimensions Leng...

Page 42: ...ification Wheelbase 770 mm Weight 124 kg Idle Speed 1 400 rpm Gear Ratio 1st 3 80 2nd 2 06 3rd 1 45 4th 1 13 5th 0 95 Battery 12v 6 3Ah Front Light 12V 35 35w Tail Light LED Fuel Tank Capacity 8 Litre...

Page 43: ...Notes...

Page 44: ...Notes...

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