Haynes Yamaha Xv V Twins Manual
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4B-2 Chapter 4 Part B Ignition system (XV700-1100 models) 1 General information These motorcycles are equipped with a battery operated, fully transistorized, breakerless ignition system. The system consists of the following components: Pick-up coil(s) Igniter unit Battery and fuse Ignition coils Spark plugs Ignition (main), engine kill (stop), sidestand and neutral switches Primary and secondary (HT) circuit wiring The transistorized ignition system functions on the same principle as a breaker point DC ignition systenxwith the pick-up coil or coils and igniter performing the tasks previously associated with the breaker points and mechanical advance system. As a result, adjustment and maintenance of ignition components is eliminated (with the exception of spark plug replacement). Models through 1990 use two pick-up coils; 1991 and later models use a single pick-up coil. Because of their nature, the individual ignition system components can be checked but not repaired. If ignition system troubles occur, and the faulty component can be isolated, the only cure for the problem is to replace the part with a new one. Keep in mind that most electrical parts, once purchased, cant be returned. To avoid unnecessary expense, make very sure the faulty component has been positively identified before buying a replacement part. 2 Ignition system - check Warning: Because of the very high voltage generated by the ignition system, extreme care should be taken when these checks are performed. 1 If the ignition system is the suspected cause of poor engine performance or failure to start, a number of checks can be made to isolate the problem. 2 Make sure the engine kill switch is in the Run position. Engine will not start 3 Disconnect one of the spark plug wires, connect the wire to a spare spark plug and lay the plug on the engine with the threads contacting the engine. If necessary, hold the spark plug with an insulated tool. Crank the engine over and make sure a well-defined, blue spark occurs between the spark plug electrodes. Warning: Dont remove one of the spark plugs from the engine to perform this check - atomized fuel being pumped out of the open spark plug hole could ignite, causing severe injury! 4 If no spark occurs, the following checks should be made: 5 Unscrew a spark plug cap from a plug wire and lay the plug wire on the cylinder head. Crank the engine over and check for spark again. If a strong blue spark occurs between the end of the wire and the engine, the plug cap or plug is faulty. If not, go to the next steps. 6 Make sure all electrical connectors are clean and tight. Check all wires for shorts, opens and correct installation. 7 Check the battery voltage with a voltmeter and - on models equipped with batteries having removable filler caps - check the specific gravity with a hydrometer (see Chapter 1). If the voltage is less than 12-volts or if the specific gravity is low, recharge the battery. 8 Check the ignition fuse and the fuse connections. If the fuse is blown, replace it with a new one; if the connections are loose or corroded, clean or repair them. 9 Refer to Chapter 8 and check the ignition switch, engine kill switch, neutral switch and sidestand switch. 10 Refer to Section 3 and check the ignition coil primary and secondary resistance. 11 Refer to Section 4 and check the pick-up coil resistance. 12 If the preceding checks produce positive results but there is still no spark at the plug, remove the igniter and have it checked by a 3.4 To test the coil primary resistance, connect the ohmmeter leads between the primary terminals in the coil connector Yamaha dealer service department or other repair shop equipped with the special tester required. Engine starts but misfires 13 If the engine starts but misfires, make the following checks before deciding that the ignition system is at fault. 14 The ignition system must be able to produce a spark across a six millimeter (1/4-inch) gap (minimum). A simple test fixture (see illustration 2.14 in Part A of this Chapter) can be constructed to make sure the minimum spark gap can be jumped. Make sure the fixture electrodes are positioned six millimeters apart. 15 Connect one of the spark plug wires to the protruding test fixture electrode, then attach the fixtures alligator clip to a good engine ground/earth. 16 Crank the engine over (it may start and run on the remaining cylinder) and see if well-defined, blue sparks occur between the test fixture electrodes. If the minimum spark gap test is positive, the ignition coil for that cylinder is functioning properly. Repeat the check on the spark plug wire that is connected to the other coil. If the spark will not jump the gap during either test, or if it is weak (orange colored), refer to steps 5 through 11 of this Section and perform the component checks described. 3 Ignition coils - check, removal and installation Check Refer to illustrations 3.4 and 3.6 1 In order to determine conclusively that the ignition coils are defective, they should be tested by an authorized Yamaha dealer service department which is equipped with the special electrical tester required for this check. 2 However, the coils can be checked visually (for cracks and other damage) and the primary and secondary coil resistances can be measured with an ohmmeter. If the coils are undamaged, and if the resistances are as specified, they are probably capable of proper operation. 3 To check the coils for physical damage, they must be removed (see Step 9). To check the resistances, simply remove the ignition coil cover from the forward side of the front cylinders mounting bracket, unplug the primary circuit electrical connectors from the coil(s) and remove the spark plug wire from the plug that is connected to the coil being checked. Mark the locations of all wires before disconnecting them. 4 To check the coil primary resistance, attach one ohmmeter lead to one of the primary terminals and the other ohmmeter lead to the
Chapter 4 Part B Ignition system (XV700-1100 models) 4B-3 3.6 To test the coil secondary resistance, connect the ohmmeter between the spark plug wire (HT) terminal and one of the primary terminals 3.11 Disconnect the coil primary connectors and remove the mounting nuts or bolts to separate them from the bracket other primary terminal (see illustration). 5 Place the ohmmeter selector switch in the Rx1 position and compare the measured resistance to the value listed in this Chapters Specifications. 6 If the coil primary resistance is as specified, check the coil secondary resistance by disconnecting either meter lead from the primary terminal connector and attaching it to the spark plug wire (HT) terminal (see illustration). 7 Place the ohmmeter selector switch in the Rx1000 position and compare the measured resistance to the values listed in this Chapters Specifications. 8 If the resistances are not as specified, the coil is probably defective and should be replaced with a new one. Removal and installation Refer to illustration 3.11 9 If youre working on an XV1000 or XV1100 model, remove the pressure sensor from the ignition coil cover located on top of the front cylinders engine mounting bracket. 10 Remove the ignition coil cover, then disconnect the spark plug wires from the plugs. Label the primary circuit electrical connectors with tape to aid in reinstallation, then disconnect them. 11 Unbolt the coils from the engine mounting bracket and remove them (see illustration). 12 Installation is the reverse of removal. Make sure the primary circuit electrical connectors are attached to the proper terminals; use their wire colors for identification (see the Wiring diagrams at the end of the book). 4 Pick-up coils - check, removal and installation Check Refer to illustration 4.3 1 If youre working on a 1981 through 1983 model, remove the fuel tank (see Chapter 3). 2 If youre working on a 1984 or later model, remove the seat, the left side cover and the luggage box (see Chapter 7). 3 On 1981 through 1990 models, locate the four-pin pick-up coil wiring connector at the igniter (see illustration). On 1991 and later models, follow the gray and black wires from the igniter to the two-pin connector in the wiring harness. Disconnect the connector. 4 Make the test on the pick-up coil side of the connector. Probe the terminals in the connector with an ohmmeter and compare the 4.3 The igniter is mounted under the fuel tank on 1981 through 1983 models (shown) or forward of the rear fender on 1984 and later models resistance reading with the value listed in this Chapters Specifications. On 1981 through 1990 models two tests are required: brown to green (rear cylinder) and red to blue (front cylinder). 5 If the pick-up coil(s) fail the above test, it must be replaced. Removal 6 Remove the alternator cover from the left side of the engine (see Chapter 8). 7 Unscrew the mounting screws and remove the pick-up coil(s) (see Chapter 8). Installation 8 Installation is the reverse of the removal steps. 5 Igniter - check, removal and installation Check 1 The igniter is checked by process of elimination (when all other possible causes have been checked and eliminated, the ignite- fault). Because the igniter is expensive and cant be returned purchased, consider having a Yamaha dealer test the before you buy a new igniter.
4B-4 Chapter 4 Part B Ignition system (XV700-1100 models) Removal and installation 1 If youre working on a 1981 through 1983 model, remove the fuel tank (see Chapter 3). 2 If youre working on a 1984 or later model, remove the seat, the left side cover and the luggage box (see Chapter 7). 3 Unplug the electrical connector, remove the mounting screws and take the igniter out (see illustration 4.3). 4 Installation is the reverse of the removal steps. 6 Pressure sensor (1984 and later XV1000 and XV1100 models) - testing, removal and installation Refer to illustration 6.2 1 Remove the pressure sensor mounting screws. Disconnect the electrical connector and pressure hose and remove the pressure sensor from the ignition coil cover. 2 Connect a 12-volt battery and 180-ohm resistor to the pressure sensor (see illustration). Connect a 0-20 volt voltmeter between the pressure sensor and ground. Compare the output voltage to the value listed in this Chapters Specifications. If its incorrect, replace the pressure sensor. 3 Installation is the reverse of the removal steps. 6.2 Pressure sensor test connections 1 Pressure sensor 2 Voltmeter 3 Battery 4 Pressure hose fitting 5 180-ohm resistor
5A-1 Chapter 5 Part A Steering, suspension and final drive (XV535 models) Contents Section Driveshaft and final drive - removal, inspection and installation.... 9 Fork oil change 3 Forks - disassembly, inspection and reassembly 5 Forks - removal and installation 4 General information 1 Handlebar - removal and installation 2 Section Rear shock absorbers - removal, inspection and installation 7 Steering head bearings - replacement 6 Swingarm bearings - check 8 Swingarm bearings - inspection and replacement ... 11 Swingarm - removal and installation . 10 Specifications Front suspension Fork spring length 1987 and 1988 US models Standard 531.6 mm (20.9 inches) Minimum 526.6 mm (20.7 inches) 1990-on US models and all UK models Standard 546.6 mm (21.5 inches) Minimum 541.6 mm (21.3 inches) Fork oil capacity 228 cc (7.71 US fl oz, 8.03 Imp fl oz) Fork oil level 176 mm (6.93 inches) below top of inner fork tube* Rear suspension Rear spring free length 1987 and 1988 US models Standard 266 mm (10.5 inches) Minimum 261 mm (10.3 inches) 1990-on US models and all UK models Standard 237.5 mm (9.35 inches) Minimum 232.2 mm (9.15 inches) Rear spring installed length 229 mm (9.01 inches) Swingarm endplay and side play limits 1 mm (0.04 inch) *With spring removed and fork fully compressed. Torque specifications Front forks Damperrod bolt 23 Nm (17ft-lbs)** Upper triple clamp pinch bolts 20 Nm (14 ft-lbs) Lower triple clamp pinch bolts . 38 Nm (27 ft-lbs) Handlebars and steering stem Handlebar bracket to steering stem nut 20 Nm (14 ft-lbs) Handlebar to bracket clamp bolts . 20 Nm (14 ft-lbs) Steering stem bolt 54 Nm (39 ft-lbs) Steering head bearing ring nut see Chapter 1 Rear shock absorber upper bolts.. 20 Nm (14 ft-lbs) Rear shock absorber lower bolts/nuts 30 Nm (22 ft-lbs) Swingarm pivot shaft 75 Nm (54 ft-lbs) Final drive unit to swingarm nuts 42 Nm (30 ft-lbs) **Apply non-permanent thread locking agent to the bolt threads.
5A-2 Chapter 5 Part A Steering, suspension and final drive (XV535 models) 2.2a On early models, pry off the rubber cover... 2.2b ... later models use a pair of plugs 2.2c Remove the Allen bolts to detach the handlebar brackets; the arrow cast in each bracket must face forward when the bracket is reinstalled 1 General information The front forks are of the conventional coil spring, hydraulically- damped telescopic type. The rear suspension consists of twin shock absorbers with coil springs and a swingarm. Final drive is of the shaft type. 2 Handlebar - removal and installation Refer to illustrations 2.2a, 2.2b, 2.2c and 2.5 1 The handlebar is a one-piece unit thats secured to the upper triple clamp by a pair of brackets. 2 To remove the handlebar from its brackets, pry out the rubber plug(s) and remove the bolts that secure the top half of each bracket (see illustrations). Lift the handlebar out. 3 If the handlebar must be removed for access to other components, such as the forks or the steering head, its not necessary to disconnect the cables, wires or hoses, but it is a good idea to support the assembly with a piece of wire or rope, to avoid unnecessary strain on the cables, wires and the brake hose. 4 If the handlebar is to be removed completely, refer to Chapter 2 for clutch cable removal procedures, Chapter 6 for the brake master cylinder removal procedures, Chapter 3 for the throttle grip removal procedure and Chapter 8 for the switch removal procedure. 5 To remove a bracket from the upper triple clamp, pull out the safety clip and remove the nut and washers (see illustration), then lift the bracket out. 6 Check the handlebar and brackets for cracks and distortion and replace them if any undesirable conditions are found. If the brackets were removed, check their rubber mounts for brittleness or deterio- ration, 7 Installation is the reverse of the removal steps. Tighten the nuts and bolts to the torques listed in this Chapters Specifications. 3 Fork oil change Refer to illustrations 3.2, 3.3, 3.4a, 3.4b, 3.5, 3.8 and 3.9 1 Support the bike securely so it cant be knocked over during this procedure. The front wheel must be raised off the ground using a jack and wood support under the crankcase, or axle stands. 2 Remove the plastic fork caps (see illustration). 3 Loosen the upper triple clamp pinch bolts (see illustration). 4 Press down the spring seat with a suitable tool (such as a large Phillips screwdriver). Remove the stopper ring, then slowly release the spring pressure and lift out the spring seat and spring (see illustrations). 5 Place a drain pan under the fork leg and remove the drain screw (see illustration). Warning: Do not allow the fork oil to contact the tire, brake disc or pads. If it does, wash off the tire, clean the disc with brake system cleaner and replace the pads with new ones before riding the motorcycle. 6 After most of the oil has drained, slowly compress and release the 2.5 Pull out the clip (arrow) and remove the nut and washers to detach the bracket from the triple clamp 3.2 Remove the plastic cap from the fork 3.3 Loosen the upper triple clamp bolts
Chapter 5 Part A Steering, suspension and final drive (XV535 models) 5A-3 3.4a Press the spring seat down against the spring pressure and pry out the stopper ring (arrow) ... 3.4b ... then remove the spring seat with its O-ring and the spring 3.5 Remove the fork drain screw (arrow) 3.8 Pour the specified amount of oil into the top of the fork forks to pump out the remaining oil. An assistant will most likely be required to do this. 7 Check the drain screw gasket and spring seat O-ring for damage and replace them if necessary. Clean the threads of the drain screw with solvent and let it dry, then install the screw and gasket, tightening it securely. 8 Pour the type and amount of fork oil, listed in this Chapters Specifications, into the fork tube through the opening at the top (see illustration). 9 Remove the jack from under the engine and slowly pump the forks a few times to purge the air. Measure the level of the oil in the fork with the fork fully compressed and without the spring in position (see illustration). Compare it to the value listed in this Chapters Specifications. Add or remove oil as necessary. 10 Coat the O-ring on the spring seat with a thin layer of multi- purpose grease. Install the spring (with its closer-wound coils at the top), spring seat and stopper ring (see illustrations 3.4b and 3.4a). 11 Install the fork cap. 12 The remainder of installation is the reverse of the removal steps. Tighten all fasteners to the torque listed in this Chapters Specifications. 4 Forks - removal and installation Removal Refer to illustrations 4.7a and 4.7b 1 Support the bike securely so it cant be knocked over during this procedure. 2 Place a jack under the engine and raise it slightly to lift the front tire off the ground. 3 Remove the brake caliper and front wheel (see Chapter 6). 4 Remove the front fender (see Chapter 7). 5 Remove any wiring harness clamps or straps from the fork tubes. 6 If the fork will be disassembled after removal, read through the disassembly procedure (see Section 5), paying special attention to the damper rod bolt removal steps. If you dont have the necessary special tool or a substitute for it, you can remove the damper rod bolt before the fork is disassembled, while the spring tension will keep the damper rod from spinning inside the fork tube. 7 Loosen the upper and lower triple clamp bolts (see illustrations), then slide the fork tubes down and remove the forks from the motorcycle. 3.9 Measure fork oil level with the fork fully compressed and the spring removed 4.7a Loosen the upper triple clamp bolts... 4.7b ... and the lower triple clamp bolts
5A-4 Chapter 5 Part A Steering, suspension and final drive (XV535 models) 5.3 Pour the fork oil into a container 5.4a Pry the dust seal out of the outer fork tube 5.4b Front fork (XV535 models) - exploded view 1 Fork cap 2 Stopper ring 3 Spring seat 4 O-ring 5 Fork spring 6 Teflon ring 7 Rebound spring 8 Damper rod 9 Oil lock piece 10 Inner fork tube 11 Outer tube bushing 12 Dust cover 13 Retaining clip 14 Oil seal 15 Outer fork tube 16 Drain screw Installation 8 Slide each fork leg into the lower triple clamp. 9 Slide the fork legs up, installing the tops of the tubes into the upper triple clamp. Position the top of the fork tube so that it is level with the top surface of the upper triple clamp. 10 The remainder of installation is the reverse of the removal procedure. Tighten all fasteners to the torques listed in this Chapters Specifications and the Chapter 6 Specifications. 11 Pump the front brake lever several times to bring the pads into contact with the disc. 5 Forks - disassembly, inspection and reassembly Disassembly Refer to illustrations 5.3, 5.4a, 5.4b, 5.5, 5.6a, 5.6b, 5.6c, 5.7 and 5.8 1 Remove the forks following the procedure in Section 4. Work on one fork leg at a time to avoid mixing up the parts. 2 Remove the fork cap, stopper ring, spring seat and spring (see Section 3, Step 4). 3 Invert the fork assembly over a container and allow the oil to drain out (see illustration). 4 Pry the dust seal from the outer tube (see illustrations). 5 Pry the retaining ring from its groove in the outer tube (see illustration). Slide the dust seal and retaining ring off the inner fork tube. 5.5 Pry out the retaining ring
Chapter 5 Part A Steering, suspension and final drive (XV535 models) 5A-5 5.6a This special Yamaha tool is used to keep the damper rod from turning when its bolt is loosened or tightened 1 Handle 2 Adapter 5.6b Loosen the damper rod bolt with an Allen wrench . 5.6c ... and remove the bolt and its copper washer - use a new copper washer during reassembly 5.7 Remove the damper rod and the rebound spring - dont separate the Teflon ring from the damper rod unless you plan to replace it 5.8 To separate the inner and outer fork tubes, pull them apart firmly several times - the slide hammer effect will pull the tubes apart 6 Prevent the damper rod from turning using a holding handle (Yamaha tool no. YM-01326, part no. 90890-01326) and adapter (Yamaha tool no. YM-01300-01, part no. 90890-01294) (see illustration) passed down through the fork inner tube to engage the damper rod head. Unscrew the Allen bolt at the bottom of the outer tube and remove the copper washer (see illustrations). Note: If you dont have access to these tools, a piece of hardwood dowel can be used instead. Cut a taper on the end of the dowel to fit into the damper rod head. Another alternative is to loosen the damper rod bolt before removing the fork cap; the pressure of the fork spring will keep the damper rod from turning. 7 Pull out the damper rod and the rebound spring (see illustration). Dont remove the Teflon ring from the damper rod unless a new one will be installed. 8 Hold the outer tube and yank the inner tube away from it, 5.14 Fit the oil lock piece onto the exposed end of the damper rod repeatedly (like a slide hammer), until the seal and outer tube guide bushing pop loose (see illustration). 9 Remove the oil seal and slide bushing from the inner tube, and the oil lock piece from the outer tube. Inspection 10 Clean all parts in solvent and blow them dry with compressed air, if available. Check the inner and outer fork tubes, the guide bushing and the damper rod for score marks, scratches, flaking of the chrome and excessive or abnormal wear. Look for dents in the tubes and replace them if any are found. Check the fork seal seat for nicks, gouges and scratches. If damage is evident, leaks will occur around the seal-to- outer tube junction. Replace worn or defective parts with new ones. 11 Have the inner fork tube checked for runout at a dealer service department or other repair shop. Warning: If it is bent, it should not be straightened; replace it with a new one. 12 Measure the overall length of the long (fork) spring and check it for cracks and other damage. Compare the length to the minimum length listed in this Chapters Specifications. If its defective or sagged, replace both fork springs with new ones. Never replace only one spring. Reassembly Refer to illustrations 5.14, 5.17, 5.18, 5.19 and 5.20 13 Install the rebound spring on the damper rod. Install the damper rod in the inner fork tube, then let it slide slowly down until it protrudes from the bottom of the inner fork tube. 14 Install the oil lock piece over the end of the damper rod that protrudes from the fork tube (see illustration).
5A-6 Chapter 5 Part A Steering, suspension and final drive (XV535 models) 5.17 If you dont have the proper tool, a section of pipe can be used the same way the special tool would be used to install the outer tube guide bushing - as a slide hammer (be sure to tape the ends of the pipe so it doesnt scratch the fork tube) 15 Install the inner fork tube in the outer fork tube. 16 Apply non-permanent thread locking agent to the damper rod bolt, then install the bolt with its copper washer and tighten it to the torque listed in this Chapters Specifications (see illustration 5.6b). Hold the damper rod from turning with the tool used in Step 6. Note: If you didn t use the tool, tighten the damper rod bolt after the fork spring and cap bolt are installed. 17 Slide the outer tube guide bushing down the inner tube. Using a special bushing driver (Yamaha tool no. YM-01367 and YM-8010, part nos. 90890-01367 and 90890-01370 or equivalent), drive the bushing into place until its fully seated. If you dont have access to one of these tools, it is highly recommended that you take the assembly to a Yamaha dealer service department or other motorcycle repair shop to have this done. It is possible, however, to drive the bushing into place using a section of pipe and an old guide bushing (see illustration). Wrap tape around the ends of the pipe to prevent it from scratching the fork tube. 18 Lubricate the lips and the outer diameter of the oil seal with the recommended fork oil (see Chapter 1) and slide it down the inner tube, with the numbered side of the seal facing up. Drive the seal into place with the same tools used to drive in the slide bushing (see illustration). If you dont have access to these, it is recommended that you take the assembly to a Yamaha dealer service department or other motorcycle repair shop to have the seal driven in. If you are very careful, the seal can be driven in with a hammer and a drift punch. Work around the circumference of the seal, tapping gently on the outer edge of the seal until its seated. Be careful - if you distort the seal, youll have to disassemble the fork again and end up taking it to a dealer anyway! 19 Install the retaining ring, making sure the ring is completely seated in its groove (see illustration). . 20 Install the dust seal, making sure it seats completely (see illustration). The same tool used to drive in the oil seal can be used for the dust seal. 21 Install the drain screw and a new gasket, if it was removed. 22 Add the recommended type and amount of fork oil (see Sec- tion 3). 23 Install the fork spring, with the closer-wound coils at the top. 24 Refer to Section 4 and install the spring seat, stopper ring and fork cap. 25 Install the fork by following the procedure outlined in Section 4. If you wont be installing the fork right away, store it in an upright position. 6 Steering head bearings - replacement Removal Refer to illustrations 6.5a, 6.5b, 6.6a, 6.6b, 6.6c, 6.7a, 6.7b, 6.7c, 6.7d and 6.8 1 If the steering head bearing check/adjustment (see Chapter 1) does not remedy excessive play or roughness in the steering head bearings, the entire front end must be disassembled and the bearings and races replaced with new ones. 2 Refer to Section 4 and remove the front forks. 3 Remove the headlight lens (see Chapter 8) and disconnect the wiring connectors within the headlight body. Detach the headlight and turn signal assemblies from the lower triple clamp and move them out of the way. 4 Remove the safety clips, nuts and washers that secure the handlebar brackets to the triple clamp. Lift the handlebar and brackets up and support the handlebar to prevent strain on the cables and hoses. 5 Unbolt the cable retainers and the brake hose retainer from the triple clamp (see illustrations). Detach the speedometer housing and bracket from the triple clamp and position them out of the way. 6 Remove the steering stem bolt and lift the upper triple clamp off the steering head (see illustrations). 5.18 Use the same tool to drive the oil seal into position 5.19 Install the retaining ring and make sure it fits securely in its groove 5.20 Slide the dust seal down the fork tube and tap it into position
Chapter 5 Part A Steering, suspension and final drive (XV535 models) 5A-7 6.5a Steering head and bearings (XV535 models) - exploded view 1 Steering stem bolt 2 Upper triple clamp 3 Ring nut 4 Bearing cover 5 Upper bearing top race 6 Steel balls (19 total) Upper bearing bottom race 8 Lower bearing top race 9 Steel balls (19 total) 10 Steering stem 6.5b The brake hose retainer bolt is accessible from underneath the triple clamp 6.6a Undo the steering stem bolt with a box wrench (ring spanner)... 6.6b ... and lift it off. 6.6c ... and lift off the upper triple clamp