Honda TMX 125a 2018 Owner'S Manual Download Page 71

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Checking the Drive Chain Wear

If the drive chain slack is excessive when the

rear axle is moved to the furthest limit of

adjustment, the drive chain is worn and must

be replaced.

Chain:

DID420AD2

KMC420JB

RUISHI420

If necessary have the drive chain replaced by

your dealer.

Drive Chain

Adjusting the Drive Chain Slack

Maintenance

Summary of Contents for TMX 125a 2018

Page 1: ......

Page 2: ...he latest production information available before printing Honda Motor Co Ltd reserves the right to make changes at any time without notice and without incurring any obligation No part of this publica...

Page 3: ...ation for building quality into every product To ensure your safety and riding pleasure Read this owner s manual carefully Follow all recommendations and procedures contained in this manual Pay close...

Page 4: ...taining a motorcycle You must use your own good judgement You will find important safety information in a variety of forms including Safety labels on the motorcycle Safety Messages preceded by a safet...

Page 5: ...Contents Motorcycle Safety P 2 Operation Guide P 12 Maintenance P 31 Troubleshooting P 71 Information P 84 Specifications P 96 Index P 99...

Page 6: ...Safety Precautions P 6 Riding Precautions P 7 Accessories Modifications P 10 Loading P 11 This section contains important information for safe riding of your motorcycle Please read this section carefu...

Page 7: ...e physically fit mentally focused and free of alcohol and drugs Check that you and your passenger are both wearing an approved motorcycle helmet and protective apparel Instruct your passenger on holdi...

Page 8: ...additional drink Don t drink and ride and don t let your friends drink and ride either Keep Your Honda in Safe Condition It s important to keep your motorcycle properly maintained and in safe riding...

Page 9: ...nous carbon monoxide a colourless odorless gas Breathing carbon monoxide can cause loss of consciousness and may lead to death If you run the engine in confined or even partly enclosed area the air yo...

Page 10: ...elmet Safety standard certified high visibility correct size for your head Must fit comfortably but securely with the chin strap fastened Face shield with unobstructed field of vision or other approve...

Page 11: ...Exercise caution on low traction surfaces u The tyres slip more easily on such surfaces and braking distances are longer Avoid continuous braking u Repeated braking such as when descending long steep...

Page 12: ...l over Make sure that high temperature parts cannot come into contact with flammable materials Do not touch the engine muffler brakes and other high temperature parts until they cool down To reduce th...

Page 13: ...switch to the LOCK position and remove the key 2 P 20 5 Turn the fuel valve to the OFF position Refuelling and Fuel Guidelines Follow these guidelines to protect the engine fuel system and catalytic c...

Page 14: ...oads and highways Before deciding to install accessories on your motorcycle be certain the modification is safe and legal 3WARNING Improper accessories or modifications can cause a crash in which you...

Page 15: ...load limits Maximum weight capacity Maximum weight on rear carrier 2 P 96 Tie all luggage securely evenly balanced and close to the centre of the motorcycle Do not place objects near the lights or the...

Page 16: ...throttle gradually Obey the speed limit Shift Change P 25 How to use basic features Instruments P 16 Indicators P 17 Switches P 18 Steering Lock P 20 Starting the Engine P 22 Start and warm the engin...

Page 17: ...ve applied the brakes Parking P 8 Stopping If pulling off the road signal early enough to show traffic that you are pulling over and pull over smoothly Turning Corners Do your braking before entering...

Page 18: ...e 14 Fuse holder P 82 Battery P 48 Spark plug P 52 Throttle grip P 68 Engine oil fill cap dipstick P 54 Kickstarter P 22 Helmet holder P 29 Engine oil drain bolt P 55 Brakelight switch P 62 Rear brake...

Page 19: ...reather P 69 Fuel fill cap P 27 Drive chain P 64 Side stand P 63 Shift lever P 25 Fuel valve P 21 Headlight P 70 Helmet holder P 29 Document bag P 30 Centre compartment P 30 Tool kit P 30 Seat P 29 Se...

Page 20: ...s Operation Guide 16 Total distance ridden Odometer Shows proper speed range for each gear Gear range Speedometer Fuel gauge Needle in the red mark remaining fuel approximately 1 07 L 0 283 US gal 0 2...

Page 21: ...t should have your dealer check for problems Operation Guide 17 Left turn signal indicator High beam indicator Neutral indicator Comes on when the transmission is in Neutral Right turn signal indicato...

Page 22: ...Switches Operation Guide 18 Headlight dimmer switch High beam Low beam u Pressing the switch turns the turn signal off Turn signal switch Start button Horn button...

Page 23: ...inued Ignition switch Switches the electrical system on off locks the steering u Key can be removed when in the Off or LOCK position On Turns electrical system on for starting riding Off Turns engine...

Page 24: ...a Turn the handlebar all the way to the left or right b Push the key down and turn the ignition switch to the LOCK position u Jiggle the handlebar if the lock is difficult to engage c Remove the key...

Page 25: ...el Valve The two way fuel valve is used to control the flow of fuel from the fuel tank to the carburetor ON normal position for riding OFF for parking storing or transportation Operation Guide 21 ON O...

Page 26: ...ion and wait 10 seconds before trying to start the engine again to recover battery voltage Extended fast idling and revving the engine can damage the engine and the exhaust system Do not operate the k...

Page 27: ...mpletely closed operate the kickstarter starting from the top of the stroke kick through to the bottom with a rapid continuous motion f Immediately after the engine starts push the choke lever down to...

Page 28: ...y off c Open the throttle fully d Crank the engine several times with the kickstarter e Repeat the starting procedure f If the engine starts open the throttle slightly if idling is unstable g If the e...

Page 29: ...ng the forward 4 step return system is used Change cannot be made from 4th to neutral directly u Always return the throttle grip first before changing gear u Operate lightly with the tips of your toes...

Page 30: ...upper limit speed can cause damage to the engine Downshifting Downshifting at speeds higher than those in the table below may overrev the engine and can cause damage to the engine and transmission Fo...

Page 31: ...ity 3 7 L 0 98 US gal 0 81 Imp gal Refuelling and Fuel Guidelines P 9 Opening the Fuel Fill Cap a Open the seat P 29 b Turn the fuel fill cap counterclockwise until it stops and remove the fuel fill c...

Page 32: ...marks on the fuel fill cap and fuel tank is aligned b Close the seat 3WARNING Petrol is highly flammable and explosive You can be burned or seriously injured when handling fuel Stop the engine and ke...

Page 33: ...Maximum Weight 3 0 kg 6 6 lb Helmet Holders The helmet holders are located under the seat u Use the helmet holders only when parked 3WARNING Riding with a helmet attached to the holder can interfere w...

Page 34: ...e or susceptible to heat damage u Do not store valuables or fragile articles Tool Kit The tool kit is in the centre compartment Document Bag The document bag is in the document compartment in the reve...

Page 35: ...adlight Case P 50 Spark Plug P 52 Engine Oil P 54 Brakes P 57 Side Stand P 63 Drive Chain P 64 Throttle P 68 Crankcase Breather P 69 Other Adjustments P 70 Adjusting the Headlight Aim P 70 Please read...

Page 36: ...ion and maintenance recommendations and schedules in this owner s manual Maintenance Safety Always read the maintenance instructions before you begin each task and make sure that you have the tools pa...

Page 37: ...Keep an accurate record of maintenance to help ensure that your motorcycle is properly maintained Make sure that whomever performs the maintenance completes this record All scheduled maintenance is c...

Page 38: ...ine Oil Centrifugal Filter Engine Idle Speed Secondary Air Supply System Secondary Air Supply Pair Filter 4 3 Years Maintenance Level Maintenance Legend Intermediate We recommend service by your deale...

Page 39: ...witch 62 Headlight Aim 70 Lights Horn Clutch System Side Stand 63 Suspension Nuts Bolts Fasteners Wheels Tyres 44 Steering Head Bearings Notes 1 At higher odometer reading repeat at the frequency inte...

Page 40: ...rcycle Fuel level Fill fuel tank when necessary 2 P 27 Throttle Check for smooth opening and full closing in all steering positions 2 P 68 Engine oil level Add engine oil if necessary Check for leaks...

Page 41: ...ry If the motorcycle is operated with insufficient battery electrolyte sulfation and battery plate damage will occur If rapid loss of electrolyte is experienced or if your battery seems to be weak cau...

Page 42: ...e splashes into your mouth u Rinse mouth thoroughly with water and do not swallow 3WARNING The battery contains sulfuric acid electrolyte which is highly corrosive and poisonous Getting electrolyte in...

Page 43: ...uid level or adding distilled water make sure breather tube is connected to the battery breather outlet The battery breather tube must be routed as shown on the label Do not bend or twist the breather...

Page 44: ...If something electrical on your motorcycle stops working check for and replace any blown fuses 2 P 82 Inspecting and Replacing Fuses Turn the ignition switch to the Off position to remove and inspect...

Page 45: ...following standards JASO T 903 standard 1 MA SAE standard 2 10W 30 API classification 3 SG or higher 1 The JASO T 903 standard is an index for engine oils for 4 stroke motorcycle engines There are tw...

Page 46: ...cket If either has worn or damaged teeth have the sprocket replaced by your dealer NOTICE Use of a new chain with worn sprockets will cause rapid chain wear Cleaning and Lubricating After inspecting t...

Page 47: ...to your clothes and the motorcycle Crankcase Breather Service more frequently when riding in rain at full throttle or after the motorcycle is washed or overturned Service if the deposit level can be s...

Page 48: ...ressure when your tyres are cold Inspecting for Damage Inspect the tyres for cuts slits or cracks that exposes fabric or cords or nails or other foreign objects embedded in the side of the tyre or the...

Page 49: ...3WARNING Riding on tyres that are excessively worn or improperly inflated can cause a crash in which you can be seriously hurt or killed Follow all instructions in this owner s manual regarding tyre i...

Page 50: ...d fail if installed in a new tyre 3WARNING Installing improper tyres on your motorcycle can adversely affect handling and stability and can cause a crash in which you can be seriously hurt or killed A...

Page 51: ...tored in the centre compartment 2 P 30 You can perform some roadside repairs minor adjustments and parts replacement with the provided tools Spark plug wrench Standard Phillips screwdriver Screwdriver...

Page 52: ...Removing Installing Body Components Battery Maintenance 48 Battery cover Screw Tool kit Positive terminal Negative terminal Battery breather tube Battery...

Page 53: ...Installation Install the parts in the reverse order of removal Always connect the positive terminal first Make sure that bolts and nuts are tight For proper handling of the battery see Maintenance Fun...

Page 54: ...3 Loosen the rearview mirrors and remove them by turning them clockwise until they will no longer turn 4 Loosen the mirror adapters and remove them Removing Installing Body Components u Headlight Case...

Page 55: ...1 Install the mirror adapters 2 Install the rearview mirrors by turning counterclockwise until they will no longer turn 3 Loosen the rearview mirrors approximately 2 turns 4 Adjust the rearview mirro...

Page 56: ...the spark plug cap from the spark plug 2 Clean any dirt from around the spark plug base 3 Remove the spark plug using provided spark plug wrench 2 P 47 4 Inspect the electrodes and centre porcelain f...

Page 57: ...ter it seats If installing a new plug tighten it twice to prevent loosening a First tighten the plug 1 4 turn after it seats b Then loosen the plug c Next tighten the plug again 1 6 turn after it seat...

Page 58: ...rcycle on its centre stand on a firm level surface 4 Remove the oil fill cap dipstick and wipe it clean 5 Insert the oil fill cap dipstick until it seats but don t screw it in 6 Check that the oil lev...

Page 59: ...ely 2 Securely reinstall the oil fill cap dipstick NOTICE Overfilling with oil or operating with insufficient oil can cause damage to your engine Do not mix different brands and grades of oil They may...

Page 60: ...d recycling centre 6 Install a new sealing washer onto the drain bolt Tighten the drain bolt Torque 24 N m 2 4 kgf m 18 lbf ft 7 Fill the crankcase with the recommended oil 2 P 41 2 P 97 and install t...

Page 61: ...he brake pedal 20 30 mm 0 8 1 2 in Make sure the brake rod brake arm spring and fastener are in good condition Inspecting the Front Brake Lever Freeplay 1 Place your motorcycle on its centre stand on...

Page 62: ...ear and corrosion Make sure the brake arm spring and fastener are in good condition Adjusting the Rear Brake Pedal Freeplay Make sure the cut out on the adjusting nut is seated on the brake arm pin wh...

Page 63: ...between the rear brake adjusting nut and brake arm pin After adjustment confirm the freeplay of the brake pedal Make sure the brake rod brake arm spring and fastener are in good condition NOTICE Do n...

Page 64: ...the freeplay If proper adjustment cannot be obtained by this method see your dealer 1 Adjust by turning the front brake adjusting nut a half turn at a time 2 Apply the brake several times and check fo...

Page 65: ...e the brake arm spring and fastener are in good condition NOTICE Do not turn the adjuster beyond its natural limits Inspecting the Brake Shoe Wear The front and rear brake are equipped with a brake we...

Page 66: ...rvice is necessary see your dealer Use only Honda Genuine Parts or its equivalent Adjusting the Brakelight Switch Check the operation of the brakelight switch Hold the brakelight switch and turn the a...

Page 67: ...1 Check that the side stand operates smoothly If the side stand is stiff or squeaky clean the pivot area and lubricate the pivot bolt with clean grease 2 Check the spring for damage or loss of tensio...

Page 68: ...mission to Neutral Stop the engine 2 Place your motorcycle on its centre stand on a firm level surface 3 Check the slack in the lower half of the drive chain midway between the sprockets Drive chain s...

Page 69: ...ine 2 Place your motorcycle on its centre stand on a firm level surface 3 Loosen the rear axle nut 4 Loosen the lock nuts on both sides of the drive chain adjusters Drive Chain u Adjusting the Drive C...

Page 70: ...th sides of the swingarm Both marks should correspond If the axle is misaligned turn the right or left adjusting nut until the marks are aligned and recheck drive chain slack 7 Tighten the rear axle n...

Page 71: ...ve when the rear axle is moved to the furthest limit of adjustment the drive chain is worn and must be replaced Chain DID420AD2 KMC420JB RUISHI420 If necessary have the drive chain replaced by your de...

Page 72: ...ly closed to fully open in all steering positions and throttle freeplay is correct If the throttle does not move smoothly close automatically or if the cable is damaged have the motorcycle inspected b...

Page 73: ...ing the Crankcase Breather 1 Place a suitable container under the crankcase breather tube 2 Remove the crankcase breather tube and drain deposits 3 Reinstall the crankcase breather tube Maintenance 69...

Page 74: ...adjust vertical aim of the headlight for proper alignment Loosen the adjusting bolt and move the headlight up or down as necessary Tighten the adjusting bolt after adjustment Obey local laws and regul...

Page 75: ...Engine Will Not Start P 72 Tyre Puncture P 73 Electrical Trouble P 78 Battery Goes Dead P 78 Burned out Light Bulb P 78 Blown Fuse P 82 Troubleshooting...

Page 76: ...rol in the fuel tank Starter Motor Does Not Operate Check the following items Check the correct engine starting sequence 2 P 22 Check for a blown fuse 2 P 82 Check for a loose battery connection 2 P 4...

Page 77: ...to make a temporary repair by patching a tube or using an aerosol sealant ride cautiously at reduced speed and have the tube replaced before you ride again Anytime a tube is replaced the tyre should...

Page 78: ...the speedometer cable by pushing the tab 4 Remove the front brake adjusting nut and disconnect the front brake cable from the brake arm 5 Remove the front axle nut 6 Remove the front axle shaft front...

Page 79: ...all the speedometer cable securely 6 Install the front brake cable and front brake adjusting nut 7 Adjust the front brake lever freeplay 2 P 60 After installing the wheel apply the brake lever several...

Page 80: ...r pin brake stopper arm nut washer and rubber grommet 5 Loosen the drive chain lock nuts and drive chain adjusting nuts on both sides of the swingarm 6 Remove the rear axle nut 7 Remove the drive chai...

Page 81: ...f m 44 lbf ft 7 After installing the wheel apply the brake pedal several times then check if the wheel rotates freely Recheck the wheel if the brake drags or if the wheel does not rotate freely If a t...

Page 82: ...arging contact your dealer NOTICE Jump starting using an automobile battery can damage your motorcycle s electrical system and is not recommended Burned out Light Bulb Follow the procedure below to re...

Page 83: ...the bulb in and turn it counterclockwise 5 Install a new bulb and parts in the reverse order of removal Do not touch the glass surface with your fingers If you touch the bulb with your bare hands clea...

Page 84: ...arts in the reverse order of removal Brakelight Taillight Bulb 1 Remove the brakelight taillight lens by removing the screws 2 Slightly press the bulb in and turn it counterclockwise 3 Install a new b...

Page 85: ...of removal u Use only the amber bulb Rear Turn Signal Bulb 1 Remove the rear turn signal lens by removing the screw 2 Slightly press the bulb in and turn it counterclockwise 3 Install a new bulb and p...

Page 86: ...es 2 P 40 1 Open the seat 2 P 29 2 Remove the battery cover 2 P 48 3 Open the fuse holder and lift out the blown fuse with the clips 4 Slide the blown fuse out of the clips Electrical Trouble u Blown...

Page 87: ...attery cover 8 Close the seat Do not pry the clips open to get a fuse out you could bend them and cause poor contact with the new fuse A loose fuse could cause damage to the electrical system and even...

Page 88: ...s Other Features P 86 Caring for Your Motorcycle P 87 Storing Your Motorcycle P 90 Transporting Your Motorcycle P 91 You the Environment P 92 Serial Numbers P 93 Fuels Containing Alcohol P 94 Catalyti...

Page 89: ...safe location To make a duplicate take the spare key or the key number to your dealer If you lose all ignition keys and the key number the ignition switch assembly will probably have to be removed by...

Page 90: ...will drain the battery Do not turn the key while riding Odometer The odometer returns to 0 when the read out exceeds 99 999 9 Document Bag The owner s manual registration and insurance information can...

Page 91: ...e to avoid scratching them Avoid directing water into the air cleaner muffler and electrical parts 3 Thoroughly rinse your motorcycle with plenty of clean water and dry with a soft clean cloth 4 After...

Page 92: ...t can damage your documents and other belongings Do not direct water at the air cleaner u Water in the air cleaner can prevent the engine from starting Do not direct water near the headlight u The hea...

Page 93: ...ing a soft sponge and plenty of water To remove stubborn stains use diluted detergent and rinse thoroughly with plenty of water Avoid getting petrol or detergents on the instruments panels or headligh...

Page 94: ...2 P 42 Place your motorcycle on its centre stand and position a block so that both tyres are off the ground After rain remove the body cover and allow the motorcycle to dry Remove the battery 2 P 48 t...

Page 95: ...cle trailer or a flatbed truck or trailer that has a loading ramp or lifting platform and motorcycle tie down straps Never try to tow your motorcycle with a wheel or wheels on the ground NOTICE Towing...

Page 96: ...Wastes Put oil and other toxic wastes in approved containers and take them to a recycling centre Call your local or state office of public works or environmental services to find a recycling centre in...

Page 97: ...cle and are required in order to register your motorcycle They may also be required when ordering replacement parts To check the frame number open the seat 2 P 29 You should record these numbers and k...

Page 98: ...10 by volume u Petrol containing ethanol may be marketed under the name Gasohol The use of petrol containing more than 10 ethanol may Damage the painting of the fuel tank Damage the rubber tubes of t...

Page 99: ...atalytic converter contributes to air pollution and can impair your engine s performance A replacement unit must be an original Honda part or equivalent Follow these guidelines to protect your motorcy...

Page 100: ...senger capacity Rider and 1 passenger Minimum turning radius 1 90 m 6 23 ft 1 Including rider passenger all luggage and accessories Displacement 109 cm3 6 6 cu in Bore x stroke 50 000 x 55 600 mm 1 96...

Page 101: ...035 in Idle speed 1 400 100 rpm Recommended engine oil Honda 4 stroke motorcycle oil API Service Classification SG or higher excluding oils marked as Energy Conserving or Resource Conserving SAE 10W...

Page 102: ...V 21 W 2 Position light 12 V 5 W Fuses Main fuse 15 A Other fuse 10 A Torque Specifications Engine oil drain bolt 24 N m 2 4 kgf m 18 lbf ft Rear wheel axle nut 59 N m 6 0 kgf m 44 lbf ft Front wheel...

Page 103: ...80 Rear Turn Signal 81 C Caring for Your Motorcycle 87 Catalytic Converter 95 Choke Lever 22 Compartment Owner s Manual 30 Tool kit 30 47 Crankcase Breather 69 Crash 4 D Document Bag 30 86 Drive Chai...

Page 104: ...18 Helmet Holders 29 High Beam Indicator 17 Horn Button 18 I Ignition Key 85 Ignition Switch 19 22 86 Indicators 17 Instruments 16 Instruments Controls Other Features 86 K Keys 85 Kickstarter 22 L Lef...

Page 105: ...7 Right Turn Signal Indicator 17 S Safety Guidelines 3 Safety Precautions 6 Serial Numbers 93 Shifting Gears 25 Side Stand 63 Spark Plug 52 Specifications 96 Speedometer 16 Start Button 18 22 Starting...

Page 106: ...Turn Signal Switch 18 Tyres Air Pressure 44 97 Puncture 73 Replacing 44 73 W Washing 87 Weight Limit 11 96 Wheels Front Removal 74 Rear Removal 76 Index 102...

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