Summary of SR125
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Printed in japan 2001 · 2 - 0.3 × 1 cr (e) printed on recycled paper yamaha motor co., ltd. 3mw-28199-e3 owner’s manual sr125.
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F_5eb_toc0.Fm page 2 wednesday, february 2, 2000 2:02 pm.
Page 3: Introduction
Eau00001 introduction welcome to the yamaha world of motorcycling! As the owner of a sr125, you are benefiting from yamaha’s vast experience in and newest technology for the design and the manufacture of high-quality products, which have earned yamaha a reputation for dependability. Please take the ...
Page 4: Important Manual Information
Eau00005 important manual information particularly important information is distinguished in this manual by the following notations: the safety alert symbol means attention! Become alert! Your safety is involved! Warning failure to follow warning instructions could result in severe injury or death t...
Page 5: Important Manual Information
Important manual information ew000002 warning @ please read this manual carefully and completely before operating this motorcycle. @ e_3mw.Book page 2 monday, february 5, 2001 9:54 am.
Page 6: Important Manual Information
Important manual information eau03337 sr125 owner’s manual © 2001 by yamaha motor co., ltd. 1st edition, january 2001 all rights reserved. Any reprinting or unauthorized use without the written permission of yamaha motor co., ltd. Is expressly prohibited. Printed in japan. E_3mw.Book page 3 monday, ...
Page 7: Table of Contents
Eau00009 table of contents give safety the right of way..................1-1 description ....................................................2-1 left view .............................................................2-1 right view...........................................................2-2 control...
Page 8: Table of Contents
Table of contents throttle cable free play adjustment.................. 6-12 cam chain adjustment ..................................... 6-12 valve clearance adjustment............................. 6-13 tires ................................................................. 6-13 wheels .................
Page 9: Give Safety The Right of Way
1 1-1 eau00021 1- give safety the right of way motorcycles are fascinating vehicles, which can give you an unsurpassed feeling of power and freedom. However, they also impose certain limits, which you must accept; even the best motorcycle does not ignore the laws of physics. Regular care and mainten...
Page 10: Description
2-1 2 eau00026 2- description left view 1. Fuel tank cap (page 3-5) 2. Fuel cock (page 3-6) 3. Helmet holder (page 3-8) 4. Fuse box (page 6-28) 5. Sidestand (page 3-9) 6. Starter (choke) knob (page 3-7) 7. Shift pedal (page 3-4) e_3mw.Book page 1 monday, february 5, 2001 9:54 am.
Page 11: Description
Description 2-2 2 right view 8. Seat (page 3-8) 9. Rear shock absorber spring preload adjusting ring (page 3-9) 10. Tool kit (page 6-1) 11. Air filter (page 6-10) 12. Engine oil filler cap 13. Rear brake pedal (page 3-5) 14. Footrest 15. Battery (page 6-26) e_3mw.Book page 2 monday, february 5, 2001...
Page 12: Description
Description 2-3 2 controls/instruments 1. Clutch lever (page 3-4) 2. Left handlebar switches (page 3-2) 3. Speedometer (page 3-2) 4. Front brake fluid reservoir (page 6-20) 5. Right handlebar switches (page 3-3) 6. Front brake lever (page 3-4) 7. Throttle grip (page 6-12) 8. Main switch/steering loc...
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3-1 3 eau00027 3- instrument and control functions eau00029* main switch/steering lock the main switch controls the ignition and lighting systems. Its operation is described below. Eau00036 on electrical circuits are switched on. The engine can be started. The key cannot be removed in this position....
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Instrument and control functions 3-2 3 eau00056 indicator lights eau00061 neutral indicator light “ ” this indicator comes on when the transmission is in neutral. Eau00057 turn indicator light “ ” this indicator flashes when the turn switch is moved to the left or right. Eau00063 high beam indicator...
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Instrument and control functions 3-3 3 eau00127 turn signal switch to signal a right-hand turn, push the switch to “ ”. To signal a left-hand turn, push the switch to “ ”. Once the switch is released it will return to the center position. To cancel the signal, push the switch in after it has returne...
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Instrument and control functions 3-4 3 eau00152 clutch lever the clutch lever is located on the left handlebar, and the ignition circuit cut- off system is incorporated in the clutch lever holder. Pull the clutch lever to the handlebar to disengage the clutch, and release the lever to engage the clu...
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Instrument and control functions 3-5 3 eau00162 rear brake pedal the rear brake pedal is on the right side of the motorcycle. Press down on the brake pedal to apply the rear brake. Eau00167 fuel tank cap to open insert the key and turn it 1/4 turn clock- wise. The lock will be released and the cap c...
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Instrument and control functions 3-6 3 eau01183 fuel make sure there is sufficient fuel in the tank. Fill the fuel tank to the bottom of the filler tube as shown in the illustra- tion. Ew000130 warning @ do not overfill the fuel tank. Avoid spilling fuel on the hot engine. Do not fill the fuel tank ...
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Instrument and control functions 3-7 3 on with the lever in this position, fuel flows to the carburetor. Normal riding is done with the lever in this position. Res this indicates reserve. If you run out of fuel while riding, move the lever to this position. Fill the tank at the first oppor- tunity. ...
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Instrument and control functions 3-8 3 eau01092 seat to remove the seat, remove the bolts. To install the seat, insert the projection on the front of the seat into the holder and push down on the seat, then tight- en the bolts. Note: @ make sure that the seat is securely fit- ted. @ eau00261 helmet ...
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Instrument and control functions 3-9 3 eau00300 rear shock absorber adjustment each shock absorber is equipped with a spring preload adjusting ring. Adjust spring preload as follows. Turn the ad- justing ring in direction a to increase spring preload and in direction b to de- crease spring preload. ...
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Instrument and control functions 3-10 3 eau00332 sidestand/clutch switch operation check check the operation of the sidestand switch and clutch switch against the in- formation below. Ew000046 warning @ ● be sure to use the centerstand during this inspection. ● if improper operation is noted, consul...
Page 23: Pre-Operation Checks
4-1 4 eau01114 4- pre-operation checks owners are personally responsible for their vehicle’s condition. Your motorcycle’s vital functions can start to deteriorate quickly and unexpectedly, even if it remains unused (for instance, if it is exposed to the elements). Any damage, fluid leak or loss of t...
Page 24: Pre-Operation Checks
Pre-operation checks 4-2 4 note: pre-operation checks should be made each time the motorcycle is used. Such an inspection can be thoroughly accom- plished in a very short time; and the added safety it assures is more than worth the time involved. Warning if any item in the pre-operation check is not...
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5-1 5 eau00372 5- operation and important riding points eau00373 warning @ ● before riding this motorcycle, become thoroughly familiar with all operating controls and their functions. Consult a yamaha dealer regarding any control or function that you do not thoroughly understand. ● never start your ...
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Operation and important riding points 5-2 5 cf-31e turn the main switch to "on" and the engine stop switch to “ ”. If the transmission is in neutral and the sidestand is down, push start switch. The engine will start. Retract the sidestand and put the transmission in gear. If the transmission is in ...
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Operation and important riding points 5-3 5 1. Turn the fuel cock to “on”. 2. Turn the main switch to “on” and the engine stop switch to “ ”. 3. Shift the transmission into neutral. Note: @ when the transmission is in neutral, the neutral indicator light should be on. If the light does not come on, ...
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Operation and important riding points 5-4 5 eau00423 shifting the transmission lets you control the amount of power you have available at a given speed for starting, accelerating, climbing hills, etc. The use of the shift pedal is shown in the illustration. To shift into neutral, depress the shift p...
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Operation and important riding points 5-5 5 eau00424 tips for reducing fuel consumption your motorcycle’s fuel consumption depends to a large extent on your riding style. The following tips can help reduce fuel consumption: ● warm up the engine before riding. ● turn off the starter (choke) as soon a...
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Operation and important riding points 5-6 5 eau00438 0 ~ 150 km avoid operation above 1/3 throttle. Stop the engine and let it cool for 5 to 10 minutes after every hour of opera- tion. Vary the speed of the motorcycle from time to time. Do not operate it at one set throttle position. 150 ~ 500 km av...
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6-1 6 eau00462 6- periodic maintenance and minor repair eau00464 periodic inspection, adjustment and lu- brication will keep your motorcycle in the safest and most efficient condition possible. Safety is an obligation of the motorcycle owner. The maintenance and lubrication schedule chart should be ...
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Periodic maintenance and minor repair 6-2 6 eau03686 periodic maintenance and lubrication chart note: _ ● the annual checks must be performed every year, except if a kilometer-based maintenance is performed instead. ● from 30,000 km, repeat the maintenance intervals starting from 6,000 km. ● items m...
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Periodic maintenance and minor repair 6-3 6 10 * wheels • check runout, spoke tightness and for damage. • tighten spokes if necessary. √ √ √ √ 11 * tires • check tread depth and for damage. • replace if necessary. • check air pressure. • correct if necessary. √ √ √ √ 12 * wheel bearings • check bear...
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Periodic maintenance and minor repair 6-4 6 eau03541 note: _ ● the air filter needs more frequent service if you are riding in unusually wet or dusty areas. ● hydraulic brake service • regularly check and, if necessary, correct the brake fluid level. • every two years replace the internal components...
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Periodic maintenance and minor repair 6-5 6 eau01122 panel removal and installation the panels illustrated need to be re- moved to perform some of the mainte- nance described in this chapter. Refer to this section each time a panel has to be removed or reinstalled. Eau00494* panels a and b to remove...
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Periodic maintenance and minor repair 6-6 6 eau01833 spark plug removal 1. Remove the spark plug cap. 2. Use the spark plug wrench in the tool kit to remove the spark plug as shown. Inspection the spark plug is an important engine component and is easy to inspect. The condition of the spark plug can...
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Periodic maintenance and minor repair 6-7 6 installation 1. Measure the electrode gap with a wire thickness gauge and, if nec- essary, adjust the gap to specifica- tion. 2. Clean the gasket surface. Wipe off any grime from the threads. 3. Install the spark plug and tighten it to the specified torque...
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Periodic maintenance and minor repair 6-8 6 eau01093* engine oil oil level inspection 1. Place the motorcycle on the cen- terstand. Warm up the engine for several minutes. Note: @ be sure the motorcycle is positioned straight up when checking the oil level. A slight tilt toward the side can result i...
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Periodic maintenance and minor repair 6-9 6 4. Remove the filter cover screws, drain bolt and the oil filter cover and oil filter. 5. Clean the oil filter and strainer with solvent. Replace if necessary. 6. Check the o-rings. If damaged, re- place it. 7. Install the drain bolt, filter cover screws a...
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Periodic maintenance and minor repair 6-10 6 eau01094 air filter the air filter should be cleaned at the specified intervals. It should be cleaned more frequently if you are riding in un- usually wet or dusty areas. 1. Remove panel a. (see page 6-5 for panel removal and installation procedures.) 2. ...
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Periodic maintenance and minor repair 6-11 6 eau00629 carburetor adjustment the carburetor is a vital part of the en- gine and requires very sophisticated adjustment. Most adjustments should be left to a yamaha dealer who has the professional knowledge and experi- ence to do so. However, the followi...
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Periodic maintenance and minor repair 6-12 6 eau00634 throttle cable free play adjustment note: @ before checking the throttle cable free play, the engine idling speed should be adjusted. @ adjust the throttle cable by turning the adjusting nut so that specified free play at the throttle grip is obt...
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Periodic maintenance and minor repair 6-13 6 eau00637 valve clearance adjustment the correct valve clearance changes with use, resulting in improper fuel/air supply or engine noise. To prevent this, the valve clearance must be adjusted regularly. This adjustment however, should be left to a professi...
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Periodic maintenance and minor repair 6-14 6 ew000083 warning @ proper loading of your motorcycle is important for several characteris- tics of your motorcycle, such as handling, braking, performance and safety. Do not carry loosely packed items that can shift. Securely pack your heaviest items clos...
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Periodic maintenance and minor repair 6-15 6 eau00681 warning @ ● operating the motorcycle with excessively worn tires decrease riding stability and can lead to loss of control. Have excessive- ly worn tires replaced by a yamaha dealer immediately. Brakes, tires, and related wheel parts replacement ...
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Periodic maintenance and minor repair 6-16 6 eau00692 clutch lever free play adjustment the clutch lever free play should be ad- justed to 10 ~ 15 mm. If the free play is incorrect, adjust as follows. 1. Loosen the locknut. 2. Turn the adjusting bolt at the clutch lever in direction a to in- crease ...
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Periodic maintenance and minor repair 6-17 6 ew000099 warning @ ● check the brake lever free play. Be sure the brake is working properly. ● a soft or spongy feeling in the brake lever can indicate the presence of air in the brake sys- tem. This air must be removed by bleeding the brake system before...
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Periodic maintenance and minor repair 6-18 6 free play the free play at the end of the brake pedal should be approximately 20 ~ 30 mm. Turn the adjusting nut in direc- tion a to increase the brake pedal free play or in direction b to reduce the brake pedal free play. Ew000103 warning @ check the ope...
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Periodic maintenance and minor repair 6-19 6 eau00720 checking the front brake pads and rear brake shoes eau01119 front brake wear indicator grooves are provided on each brake pad. These indicators allow checking of brake pad wear with- out disassembling the brake. Inspect the grooves. If they have ...
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Periodic maintenance and minor repair 6-20 6 eau00732 inspecting the brake fluid level insufficient brake fluid may let air enter the brake system, possibly causing the brakes to become ineffective. Before riding, check that the brake fluid is above the minimum level and fill when necessary. Observe...
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Periodic maintenance and minor repair 6-21 6 eau00746 drive chain slack check note: @ spin the wheel several times and find the tightest position of the chain. Check and/or adjust the chain slack while it’s in this tightest position. @ the chain slack should be checked through the inspection window ...
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Periodic maintenance and minor repair 6-22 6 eau01533 drive chain slack adjustment 1. Loosen the rear brake adjusting nut. 2. Loosen the wheel axle nut. 3. To tighten the chain, turn the chain adjusting plates in direction a . To loosen the chain, turn the chain adjusting plates in direction b and p...
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Periodic maintenance and minor repair 6-23 6 eau01106* drive chain lubrication the chain consists of many parts which work with each other. If the chain is not maintained properly, it will wear out quickly. Therefore, the chain must be serviced regularly. This service is es- pecially necessary when ...
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Periodic maintenance and minor repair 6-24 6 eau02984 brake and shift pedal lubrication lubricate the pivoting parts. Eau02985 brake and clutch lever lubrication lubricate the pivoting parts. Eau02965 center and sidestand lubrication lubricate the pivoting and mating joints. Check to see that the ce...
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Periodic maintenance and minor repair 6-25 6 ew000114 warning @ if the center and/or sidestand does not move smoothly, consult a yamaha dealer. @ eau02939 front fork inspection visual check ew000115 warning @ securely support the motorcycle so there is no danger of it falling over. @ check for scrat...
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Periodic maintenance and minor repair 6-26 6 eau00794 steering inspection periodically inspect the condition of the steering. Worn out or loose steering bearings may be dangerous. Place a stand under the engine to raise the front wheel off the ground. Hold the lower end of the front forks and try to...
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Periodic maintenance and minor repair 6-27 6 ec000099 caution: @ when inspecting the battery, be sure the breather hose is routed cor- rectly. If the breather hose is posi- tioned in such a way as to cause battery electrolyte or gas to exit onto the frame, structural and cos- metic damage to the mot...
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Periodic maintenance and minor repair 6-28 6 battery storage ● when the motorcycle will not be used for a month or longer, re- move the battery, fully charge it and store it in a cool, dry place. Completely recharge the battery before reinstallation. ● if the battery will be stored for longer than t...
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Periodic maintenance and minor repair 6-29 6 eau03003 headlight bulb replacement this motorcycle is equipped with a quartz bulb headlight. If the headlight bulb burns out, replace the bulb as follows: 1. Remove the headlight unit screws. 2. Remove the connector, the head- light unit and then the bul...
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Periodic maintenance and minor repair 6-30 6 eau00855* turn signal and tail/brake light bulb replacement 1. Remove the screws and the lens. 2. Push the bulb inward and turn it counterclockwise. 3. Place a new bulb in the socket. Push the bulb inward and turn it clockwise until it engages into the so...
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Periodic maintenance and minor repair 6-31 6 3. Loosen the pinch bolt. 4. Remove the wheel axle. Make sure the motorcycle is properly supported. Note: @ do not depress the brake lever when the disc and caliper are separated. @ eau01394 front wheel installation 1. Install the speedometer gear unit in...
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Periodic maintenance and minor repair 6-32 6 eau01116* rear wheel removal ew000122 warning @ ● it is advisable to have a yamaha dealer service the wheel. ● securely support the motor- cycle so there is no danger of it falling over. @ 1. Place the motorcycle on the cen- terstand. 2. Remove the cotter...
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Periodic maintenance and minor repair 6-33 6 eau01723* rear wheel installation 1. Install the rear wheel and the axle. 2. Install the axle nut and let the motorcycle down. 3. Insert the brake rod into the brake cam lever and install the brake pedal free play adjusting nut. 4. Install the brake torqu...
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Periodic maintenance and minor repair 6-34 6 eau03009 troubleshooting chart ew000125 warning @ never check the fuel system while smoking or in the vicinity of an open flame. @ check if there is fuel in the fuel tank. 1. Fuel enough fuel. No fuel. Go to compression check. Supply fuel. Engine doesn’t ...
Page 65: Motorcycle Care and Storage
7-1 7 eau01518 7- motorcycle care and storage care the exposure of its technology makes a motorcycle charming but also vulner- able. Although high-quality compo- nents are used, they are not all rust-re- sistant. While a rusty exhaust pipe may remain unnoticed on a car, it does look unattractive on ...
Page 66: Motorcycle Care and Storage
Motorcycle care and storage 7-2 7 eca00010 caution: @ ● avoid using strong acidic wheel cleaners, especially on spoked wheels. If you do use such products for hard-to-remove dirt, do not leave it on any long- er than instructed, then thor- oughly rinse it off with water, immediately dry the area and...
Page 67: Motorcycle Care and Storage
Motorcycle care and storage 7-3 7 after riding in the rain, near the sea or on salt-sprayed roads since sea salt or salt sprayed on the roads in the winter are extremely corro- sive in combination with water, carry out the following steps after each ride in the rain, near the sea or on salt- sprayed...
Page 68: Motorcycle Care and Storage
Motorcycle care and storage 7-4 7 eca00013 caution: @ ● apply spray oil and wax spar- ingly and wipe off any excess. ● never apply oil or wax on rub- ber and plastic parts, but treat them with a suitable care prod- uct. ● avoid using abrasive polishing compounds as they wear away the paint. @ note: ...
Page 69: Motorcycle Care and Storage
Motorcycle care and storage 7-5 7 a. Remove the spark plug cap and spark plug. B. Pour a teaspoonful of engine oil into the spark plug bore. C. Install the spark plug cap onto the spark plug and place the spark plug on the cylinder head so that the electrodes are grounded. (this will limit sparking ...
Page 70: Specifications
8-1 8 eau01038 8- specifications specifications model sr125 dimensions overall length 2,020 mm overall width 775 mm overall height 1,100 mm seat height 745 mm wheelbase 1,285 mm ground clearance 155 mm minimum turning radius 2,100 mm basic weight (with oil and full fuel tank) 113 kg engine engine ty...
Page 71: Specifications
Specifications 8-2 8 fuel type regular unleaded gasoline fuel tank capacity 10.0 l fuel reserve amount 1.6 l carburetor type × quantity y24p × 1 manufacturer teikei spark plug manufacturer/type ngk / dr8ea gap 0.6 ~ 0.7 mm clutch type wet, multiple-disc transmission primary reduction system spur gea...
Page 72: Specifications
Specifications 8-3 8 maximum load* 160 kg air pressure (cold tire) up to 90 kg load* front 175 kpa (1.75 kg/cm 2 , 1.75 bar) rear 200 kpa (2.00 kg/cm 2 , 2.00 bar) 90 kg load ~ maximum load* front 175 kpa (1.75 kg/cm 2 , 1.75 bar) rear 225 kpa (2.25 kg/cm 2 , 2.25 bar) *load is total weight of cargo...
Page 73: Specifications
Specifications 8-4 8 bulb voltage, wattage × quantity headlight 12 v, 60/55 w × 1 auxiliary light 12 v, 4 w × 1 tail/brake light 12 v, 5/21 w × 1 turn signal light 12 v, 21 w × 4 meter light 14 v, 3 w × 1 neutral indicator light 12 v, 1.7 w × 1 high beam indicator light 12 v, 1.7 w × 1 turn indicato...
Page 74: Specifications
Specifications 8-5 8 eau01064 how to use the conversion table cs-02e all specification data in this manual are listed in si and metric units. Use this table to convert metric unit data to imperial unit data. Ex. Metric multiplier imperial **mm × 0.03937 = **in 2 mm × 0.03937 = 0.08 in conversion tab...
Page 75: Consumer Information
9-1 9 eau01039 9- consumer information eau02944 identification number records record the key identification number, vehicle identification number and mod- el label information in the spaces pro- vided for assistance when ordering spare parts from a yamaha dealer or for reference in case the vehicle ...
Page 76: Consumer Information
Consumer information 9-2 9 eau01050 model label the model label is affixed to the frame under the seat. (see page 3-8 for seat removal procedures.) record the infor- mation on this label in the space pro- vided. This information will be needed to order spare parts from your yamaha dealer. 1. Model l...
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F_5eb_toc0.Fm page 2 wednesday, february 2, 2000 2:02 pm.
Page 78: 3Mw-28199-E3
Printed in japan 2001 · 2 - 0.3 × 1 cr (e) printed on recycled paper yamaha motor co., ltd. 3mw-28199-e3 owner’s manual sr125.