User manual YAMAHA TW125-2003

[. . . ] OWNER'S MANUAL TW125 5RS-28199-E1 EAU04575 INTRODUCTION Welcome to the Yamaha world of motorcycling!As the owner of the TW125, you are benefiting from Yamaha's vast experience and newest technology regarding the design and manufacture of high-quality products, which have earned Yamaha a reputation for dependability. Please take the time to read this manual thoroughly, so as to enjoy all advantages of your TW125. The owner's manual does not only instruct you in how to operate, inspect and maintain your motorcycle, but also in how to safeguard yourself and others from trouble and injury. [. . . ] Therefore, most carburetor adjustments should be left to a Yamaha dealer, who has the necessary professional knowledge and experience. The adjustment described in the following section, however, may be serviced by the owner as part of routine maintenance. Adjusting the engine idling speed The engine idling speed must be checked and, if necessary, adjusted as follows at the intervals specified in the periodic maintenance and lubrication chart. The engine should be warm before making this adjustment. NOTE: 8 The engine is warm when it quickly responds to the throttle. 8 A diagnostic tachometer is needed to make this adjustment. Attach the tachometer to the spark plug lead. 1 1. Air filter check hose To clean the air filter check hose 1. Check the hose at the bottom of the air filter case for accumulated dirt or water. If dirt or water is visible, remove the hose, clean it, and then install it. cC EC000094 6 The carburetor has been set and extensively tested at the Yamaha factory. Changing these settings without sufficient technical knowledge may result in poor performance of or damage to the engine. 6-14 PERIODIC MAINTENANCE AND MINOR REPAIR NOTE: If the specified idling speed cannot be obtained as described above, have a Yamaha dealer make the adjustment. b 1 1. Throttle cable free play EAU00635 6 2. Check the engine idling speed and, if necessary, adjust it to specification by turning the throttle stop screw. To increase the engine idling speed, turn the screw in direction a. To decrease the engine idling speed, turn the screw in direction b. Engine idling speed: 1, 450­1, 650 r/min Adjusting the throttle cable free play The throttle cable free play should measure 3­5 mm at the throttle grip. Periodically check the throttle cable free play and, if necessary, have a Yamaha dealer adjust it. 6-15 PERIODIC MAINTENANCE AND MINOR REPAIR EAU00637 EAU04401 Adjusting the valve clearance The valve clearance changes with use, resulting in improper air-fuel mixture and/or engine noise. To prevent this from occurring, the valve clearance must be adjusted by a Yamaha dealer at the intervals specified in the periodic maintenance and lubrication chart. Tires To maximize the performance, durability, and safe operation of your motorcycle, note the following points regarding the specified tires. Tire air pressure The tire air pressure should be checked and, if necessary, adjusted before each ride. Load* Up to 90 kg Tire air pressure (measured on cold tires) Front Rear 150 kPa 150 kPa (1. 50 kgf/cm2, (1. 50 kgf/cm2, 1. 50 bar) 1. 50 bar) 150 kPa 175 kPa (1. 50 kgf/cm2, (1. 75 kgf/cm2, 1. 50 bar) 1. 75 bar) 180 kg 90 kg­maximum Maximum load* * Total weight of rider, passenger, cargo and accessories w EW000082 8 The tire air pressure must be checked and adjusted on cold tires (i. e. , when the temperature of the tires equals the ambient temperature). 8 The tire air pressure must be adjusted in accordance with the riding speed and with the total weight of rider, passenger, cargo, and accessories approved for this model. 6 6-16 PERIODIC MAINTENANCE AND MINOR REPAIR w EWA00040 6 Because loading has an enormous impact on the handling, braking, performance and safety characteristics of your motorcycle, you should keep the following precautions in mind. Operation of an overloaded motorcycle may result in tire damage, loss of control, or severe injury. Make sure that the total weight of rider, passenger, cargo, and accessories does not exceed the specified maximum load for the vehicle. 8 Do not carry along loosely packed items, which can shift during a ride. [. . . ] Lubricate all control cables and the pivoting points of all levers and pedals as well as of the sidestand/centerstand. Check and, if necessary, correct the tire air pressure, and then lift the motorcycle so that both of its wheels are off the ground. Alternatively, turn the wheels a little every month in order to prevent the tires from becoming degraded in one spot. Cover the muffler outlet with a plastic bag to prevent moisture from entering it. [. . . ]