how to test a coil on a yamaha sr 125

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HARLEY DAVIDSON DYNA CHROME COIL COVER KITS INSTALLATION MANUAL

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Filed Under (Harley Davidson) by admin on 06-03-2011

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Installation 1. Refer to the Service Manual and follow the instructions given to remove the maxi-fuse. 2. Note the position of each spark plug wire in the ignition coil, then disconnect the two wires. 3. If there is an existing coil cover: Remove and discard the coil-cover mounting screws and spacers. Remove and discard the coil cover. If there is not an existing coil cover: Remove and discard the two coil mounting screws. 4. See the Service Parts illustration. Obtain the coil cover bracket (3), two long screws (4) and two spacers (2) from the kit. 5. Insert the screw into one of the holes in the bracket as shown, through a spacer, and into a coil mounting hole. Repeat with the second screw and spacer. 6. Assemble the coil to the electrical caddy with the two screws. Tighten the screws to 50 in-lbs (5.6 Nm). 7. Obtain the new chrome coil cover (1) from the kit. Position the cover over the coil, and fasten to the coil cover bracket with the three chrome screws (6) and washers (7) from the kit. Do not fully tighten the screws at this time. 8. Connect the spark plug wires through the holes in the side of the coil cover onto the correct coil terminals. 9. Adjust the cover to center the spark-plug wire boots in the coil cover holes for best appearance. Tighten the three chrome screws securely 10. Refer to the Service Manual and follow the instructions given to install the maxi-fuse

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HARLEY DAVIDSON CHROME SEAT POST REMOVAL AND INSTALLATION INSTRUCTIONS

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Filed Under (Harley Davidson) by admin on 11-02-2011

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REMOVE 2 1 is00000 1. Seat Post 2. Screw Figure 2. Lower Seat Post 1. Refer to Owners Manual to remove the seat. To prevent accidental vehicle start-up, which could cause death or serious injury, disconnect negative (-) battery cable before proceeding. (00048a) 2. Disconnect battery negative cable. 3. On motorcycles equipped with oxygen sensors, disconnect the rear sensor connector. 4. See Figure 2. Remove screw (2) and washer from the lower seat post (1) and discard. -J04294 1 of 2 5. Disconnect spark plug wires and primary wire from ignition coil. 6. See Figure 3. Loosen the bracket screws (1). Remove seat post screw (2) and seat post with ignition coil and cover. 7. See Figure 4. Remove coil cover screw (5) and cover (4) from stock seat post (1). 8. Remove ignition coil screws (3) and coil (2) from seat post. 2 1 is04241 1. Bracket Screws 2. Upper Seat Post Screw Figure 3. Upper Seat Post Fasteners 2 5 1 3 4 is04337 1. Seat Post 2. Ignition Coil 3. Coil Screw 4. Coil Cover 5. Coil Cover Screw Figure 4. Install Ignition Coil to Seat Post INSTALL 1. See Figure 4. Install ignition coil (2) to new seat post using screws (3). Tighten ignition coil screws to 10-15 ft-lbs (13.6-20.3 Nm) . 2. Install coil cover (4) to seat post with screw (5) and tighten to 30-40 in-lbs (3.4-4.5 Nm) . 3. See Figure 1. Place seat post (1) in position and attach lower post with screw (2), washers (3) and dome nut (4). Tighten screw (2) to 10-15 ft-lbs (13.6-20.3 Nm) . 4. See Figure 3. Attach upper seat post with screw (2). Tighten screw (2) to 12-15 ft-lbs (16.2-20.3 Nm) . Tighten bracket screws (1) to 12-15 (16.2-20.3 Nm) . 5. Connect primary wire to ignition coil. 6. Connect spark plug wires to ignition coil. The rear cylinder plug wire attaches to the top coil post. Ensure that spark plug wire boots are fastened securely. 7. Connect rear oxygen sensor connector, if equipped. 8. Reconnect battery negative cable

YAMAHA XS650H/ SH Supplementary Service Manual

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Filed Under (Yamaha) by admin on 21-11-2010

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Ignition timing check 1. Ignition timing is checked with a timing light by observing the position of the rotor pointer and the marks stamped on the timing plate. The timing plate is marked as follows. “ll” Firing range for No. 1 (L.H.) “T” Top Dead Center for No. 1, fL.H.1 cylinder 2. Connect the timing light to the left cylinder spark plug lead wire. 3. Start the engine and keep the engine speed as specified. Use a tachometer to check the engine speed. B. PICK-UP COIL ASSEMBLY The method of mounting the pick-up coil assembly is changed for easier service work. Thus, the followings “Pick-up coil assembly removal” and “Pick-up coil assembly reinstallation” should be changed. Pick-up coil assembly removal Remove the pick-up coil securing screws and remove the pick-up coil assembly. Pick-up coil assembly reinstallation Install the pick-up coil assembly on to the stator assembly. _ L 4. Specified engine speed: 1,200 r/min The rotor pointer should be within the limits of ” fl ” on the timing plate. If it exceeds the limits or does not steady, check the timing plate for tight- ness and/or ignition system for damage. NOTE: Ignition timing is not adjustable. C. FUEL LEVEL The carburetor is furnished with a drain screw to provide easy access to service work. Thus, the following “Fuel level measurement” should be added. Fuel level measurement NOTE: Before checking the fuel level, note the follow- ing: 1. Place the motorcycle on a level surface. 2. Adjust the motorcycle position by placing a suitable stand or a garage jack under the engine so that the carburetor is positioned vertically. 1. 2. Connect the level gauge (special tool) or a vinyl pipe of 6 mm (0.24 in) in inside diameter to the float bowl nozzle left or right side carburetor. Set the gauge as shown and loosen the drain screw 3. Start the engine and stop it after a few minutes of run. This procedure is neces- sary to obtain the correct fuel level. NOTE: Make sure the fuel petcock is “ON” or “RES” oosition. 4. Note the fuel level and bring the gauge to the other end of the carburetor line and repeat step 3 above. Note the fuel level again and compare it with the previous gauge reading. They should be equal. If not, place a suitable size of wooden piece or the. alike under the center stand and adjust. 5. Check the fuel level one by one. The level should be in the specified range.

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HI-4 DUAL FIRE MOTORCYCLE IGNITION INSTALLATION INSTRUCTIONS

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Filed Under (Yamaha) by admin on 09-11-2010

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Turn ignition switch off and disconnect battery ground cable. 2. Refer to Figure 3. Remove OE ignition module and wire harness (items 1-4). You will disconnect two wires at the coil (15), a wire going to the VOES (Vacuum Operated Electrical Switch) (18), a black ground wire at the ignition module, and the 3 pin plug (20) that connects to the sensor plate (11). Refer to shop manual for locations. 3. Remove ignition cover plates and gasket (items 5- 9). This will require drilling out two rivets. The rivets will later be replaced with two supplied self- threading screws. 4. In order to remove the sensor plate cable, the cable plug (20) must be removed first. Use needle nose pliers to pull the terminals out of the plug. Then pull the cable through the exit hole at the bottom of the timing cover. 5. Note location of sensor plate (11). There is a V notch in the sensor plate used for alignment. When you install the HI-4, you should align the V notch in the same location. This should set the timing close enough to start the engine. Remove and save the two standoffs and washers (10). Remove the sensor plate (11). HI-4 INSTALLATION Refer to Figure 4. The HI-4 requires use of the OE timing rotor P/N 32402-83 (used only on 1985 and newer models). If you have an older model or are not sure, check the rotor (9) for the correct part number. For models prior to 1980, use the supplied 10-32 x ¾”bolt and washer to mount the rotor. 1. Install the HI-4 system in place of the OE breaker or sensor plate. Rotate the HI-4 about 90 degrees to give better access to the cable exit hole. Install the HI-4 first, then push the cable through the hole. On some early models it may be necessary to enlarge the wire harness exit hole in the gear cover. Align the V notch on the HI-4 same as the OE plate you removed. Use the OE standoffs to secure the HI-4. You must use lockwashers under the standoffs for proper clearance between the HI-4 and cover plate. Do not fully tighten the standoffs until the timing has been set. 2. Route the HI-4 wire harness along the frame rails up to the coil. Make sure that harness will not be chafed or burned by exhaust heat. Secure harness with tie wraps. Do not install timing cover. HI-4 HOOKUP Crimp terminals and hardware are supplied for your convenience. Use the ring terminals for coil hookup. Use male-female quick disconnects for connections to the tach and vacuum switch (VOES). Tape up any unused wires. 1. Circuit Breaker Cover Screws (2) 2. Circuit Breaker Cover 3. Circuit Breaker Cover Gasket 4. Breaker Plate Screws (2) 5. Breaker Plate Screw Lockwashers & Washers (2 each) 6. Retainer (1971 to early 1972) 7. Circuit Breaker Cam Bolt 8. Breaker Plate Assembly 9. Breaker Cam 10. Advance Assembly 11. Gear Case Cover 11 10 9 8 7 6 5 4 3 2 1 NOTE: Damage will result if the brown tach wire comes in contact with +12V. Figure 1. Harley-Davidson®OE Points System
9000-4002A REV A 3 2/05 1. Identify switched +12 volt wire and tach wire (if equipped) going to the coil. Refer to your service manual, or reconnect the battery and use a test light or voltmeter. The switched +12 volt wire will be hot when the ignition key is turned on. 2. Refer to Figure 5. Connect the HI-4 red wire and switched +12 volt wire to Coil positive. 3. The HI-4 white wire is not used and should be taped. 4. Connect the HI-4 black wire to the Coil negative terminal. 5. Connect the HI-4 green wire to the vacuum switch (Figure 3, item 18), if used. 6. Connect the HI-4 brown wire to the tach wire, if equipped with tach. Tape up if unused. 7. The HI-4 is grounded via the timing housing; a separate ground connection is not required. 8. Reconnect battery ground cable. Verify proper ground connections to the frame and engine. VOES HOOKUP The OE vacuum switch (VOES) is normally an open circuit. Above 3-5 inch-Hg vacuum, the VOES closes and grounds the vacuum input on the OE ignition module. This increases the total advance generated by the OE ignition module. Vacuum advance improves part throttle 17 16 1. Cover Screws (2) 2. Ignition Timer Cover 3. Ignition Module 4. Timer Plate Screws (2) 5. Washers (2) 6. Screws & Washers (2 each) 7. Shield 8. Sensor 9. Trigger Rotor Bolt 10. Timer Plate 11. Trigger Rotor 12. Advance Assembly 13. Gear Case Cover 14. Ignition Coil 15. Spark Plug Wires (2) 16. Ignition Coil Terminal (FX) 17. Ignition Coil Terminal (FL) 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 NOTE: Most motorcycle coils do not have terminals marked. Use either terminal for Coil+ (positive) and the other one for Coil- (negative). Warning: The HI-4 (8-1100) Dual Fire ignition will not work with 2 plugs per head, dual coil application. Damage will result if attempted. Use the HI-4 (8-2100) single fire ignition for 2 plugs per head applications

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YAMAHA MOTOR CORPORATION, U.S.A. STREET & ENDURO MOTORCYCLE LIMITED WARRANTY

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Filed Under (Yamaha) by admin on 27-12-2011

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GENERALEXCLUSIONS from this warranty shall include any failures caused by: a. Competition or racing use. b. Installation of parts or accessories that are not qualitatively equivalent to genuine Yamaha parts. c. Abnormal strain, neglect, or abuse. d. Lack of proper maintenance. e. Accident or collision damage. f. Modification to original parts. g. Damage due to improper transportation. SPECIFIC EXCLUSIONS from this warranty shall include parts replaced due to normal wear or routine maintenance. THE CUSTOMER’S RESPONSIBILITY under this warranty shall be to: 1. Operate and maintain the motorcycle as specified in the appropriate Owner’s Manual. 2. Give notice to an authorized Yamaha motorcycle dealer of any and all apparent defects within ten (10) days after discovery, and make the machine available at that time for inspection and repairs at such dealer’s place of business. You may locate your nearest authorized Yamaha dealer through your local telephone directory. WARRANTY TRANSFER: To transfer any remaining warranty from the original purchaser to any subsequent purchaser, it is imperative that the machine be inspected and registered for warranty by an authorized Yamaha motorcycle dealer. In order for this warranty to remain in effect, this inspection and registration must take place within ten (10) days after transfer. Areasonable dealer imposed fee may be charged for the inspection. In no case will warranty be extended beyond the original period. EMISSIONS CONTROLSYSTEM WARRANTY Yamaha Motor Corporation, U.S.A. also warrants to the ultimate purchaser and each subsequent purchaser of each Yamaha motorcycle covered by this warranty with a displacement of 50cc or greater, that the vehicle is designed, built, and equipped so as to conform at the time of sale with all U.S. emissions standards applicable at the time of manufacture and that it is free from defects in materials and workmanship which would cause it not to meet these standards within the periods listed immediately below. Failures other than those resulting from defects in material or workmanship which arise solely as a result of owner abuse and/or lack of proper maintenance are not covered by this warranty.

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Honda CR 125/ 250R The MSD Enhancer Ignition INSTALLATION

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Filed Under (Honda) by admin on 27-11-2011

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The following explains some technical aspects of the Enhancer Ignition. Battery: The battery is necessary to the operation of the Enhancer in two regards. • The battery supplies voltage to the complex timing feature of the Enhancer.
• The Enhancer has a built in boost circuit that amplifies the spark energy at low rpm where the stock magneto is insufficient. The MSD NiCad Battery pack, PN 4381, must be charged with the recommended battery charger or an MSD Fast Charger, PN 4385. The battery should be completely discharged before recharging. If a 7.2 Battery Charger is used, the recommended time for charging is seven hours. With the MSD Fast Charger the battery only needs to charge for one hour. Note: No fast charger besides the MSD Fast Charger may be used to charge the MSD NiCad Battery. Damage to the battery will occur. Timing: The Enhancer Ignition allows the user to adjust the ignition timing curve to optimize engine
power output. This is done by rotating the potentiometer shaft located on the back of the ignition. Clockwise rotation retards the timing while counterclockwise advances the timing (Figure 1). Coil: The MSD Enhancer Ignition System includes a special Pro CD Coil. This coil has an extremely low primary resistance and a high turns ratio to produce maximum spark energy. The Pro CD Coil is encapsulated in a Rynite compound that is impervious to contaminates and vibration. Note: Do not use the stock coil with the Enhancer Ignition

YAMAHA TTR 125 SHOCKS REMOVAL AND INSTALLATION MANUAL

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Filed Under (Yamaha) by admin on 08-01-2012

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1. With the bike unloaded on the side stand and the shock fully extended, have an assistant measure from a point at the axle (center point) to a point on the frame, fender or bodywork directly above it. Record this measurement. 2. With the bike off the stand and the rider in the seat, bounce on the suspension and let the bike settle. Have the assistant measure from the same two points. Subtract the second measurement from the first. 3. The amount of settle, or “sag” is a function of the wheel travel. It should only be between 1/4 and 1/3 of the total travel. 4. If the difference is less than the minimum, reduce the spring preload. Measure the distance again starting with Step 2. Adjust again if necessary. 5. If the difference is more than the maximum, increase the spring preload. Measure the distance again starting with Step 2. Adjust again if necessary. Note: If the ride height is too low, the shock will bottom unnecessarily, resulting in a harsh ride. If the ride height is too high, the shock will “top out” too easily when rebounding from a bump or under hard deceleration. NITROGEN PRESSURES IN EMULSION SHOCKS CAUTION: The pressure in these shocks cannot successfully be checked. Concerns with the gauge volume and the gas volume in the shock body create a situation where you cannot accurately determine what pressure was in the shock. In addition when the pressure is lowered (i.e. checking the pressure) the gas and some of the shock oil escapes into the gauge. It is possible to lose a large percentage of the shock oil by depressing the core of a charged shock to the atmosphere. Please note that in order to check the pressure, some of the gas must escape and fill the gauge assembly. The volume of the gas pocket is about half the size of your thumb, so a very small volume change results in a large pressure drop. Because the gauges’ volumes vary, it is not possible to deduce the actual pressure in the shock prior to attaching the gauge. Therefore it is imperative that any attempt to check pressure be accompanied by the capability of refilling the shock. In other words: If you don’t have a nitrogen source handy, don’t check the pressure

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Harley-Davidson Electronic Ignition Module Installation instructions

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Filed Under (Harley Davidson) by admin on 23-04-2012

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Step 1: Switch main dashboard switch to “off” position (Ignition& light switch) Step 2: Disconnect negative (ground) cable from the Battery Step 3: Remove the Condenser and Breaker points from the circuit breaker timing base. Step 4: Disconnect advance/ retard cable from timing base Step 5: Remove timing base from timer shaft and housing (see your manual for instructions) Step 6: Remove circuit breaker wire stud or circuit breaker to coil wire assembly from timing base Step 7: Remove circuit breaker wire from Ignition coil, and mark terminal on coil with piece of tape. Step 8: Install the Electronic Ignition Module on the timing base. Mount this short black wire to one on the timer base screws by keeping some slack in this wire so the timing base can turn free. Solder the flag terminal to this short black wire and mount it under the timer to motor bolt. This way of mounting provides a much better grounding. Do NOT use the screws (number 1 or 2 screws from picture below) from the timing base!!!! Step 9: Now three wires pass this hole via the rubber grommet. Figure 1 Figure 2 Step 10: Reinstall the timer base on the timer shaft housing, and keep some slack in the wires before protruding the hole in the timer shaft housing, and secure with ground spring and cover retainer. Reconnect the advance/retard cable to the timer base. Step 11: Route the two long wires to the ignition coil. Check in the HD service manual for a proper route to the ignition coil. (Keep away from hot surfaces like exhaust systems). Cut the wires to the exact length necessary for mounting. Step 12: Determine the exact length of the wire loom. Keep in mind that one end of the loom enters the timer shaft housing by 1cm. Cut the loom to the proper length. Step 13: Insert both wires in the loom. Strip both wire ends and solder the two flag terminals on the wires. Step 14: Connect the red wire to the ignition coil, on the terminal where the 6 or 12 volt is supplied to. This terminal has at minimum one wire connected which runs to the main switch. Step 15: Connect the black wire to the ignition coil on the terminal which is empty, and has piece of tape on it. (Old place where the circuit breaker wire was connected to) Step 16: Install the trigger rotor on the timer shaft cam, and tighten the hex screw by using the hex key tool. Do not over tighten the screw! Step 17: Check for clearance between trigger rotor and Electronic Ignition Module. Appropriate clearance is between 0,5mm and 1,5mm . Minor adjustments can be made by unlocking the two screws and slightly shift/move the Electronic Ignition Module. Check if the rotor moves free. Timing instructions: Remove the spark plugs from the engine, but keep them connected to the spark coil cables and engine ground. This enables normal operation of the spark, and prevents unwanted engine firing on compression stroke. See service manual or handbook for timing instructions of your model Step 18: Reconnect the negative (ground) cable to the battery. Step 19: Switch main power to “on” position. The red light in the Electronic Ignition Module might already light up. If not, turn the kick starter slowly. The red light is on while charging (closed points)the Ignition coil, facing solid metal of the trigger rotor. The light goes off (open points) when the end of the solid surface of the trigger rotor passes the centre of the Electronic Ignition Module. At that point a spark is generated by the coil

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SANYANG HD 125/ 200 Specifications And SERVICE MANUAL

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Filed Under (Sym) by admin on 24-11-2010

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heck and adjustment Fault condition Probable causes Loosen carburetor drain bolt to check if there is gasoline inside the carburetor Fuel supplied tom carburetor sufficient No fuel is supplied to carburetor Remove spark plug, install it into spark plug cap, and perform a spark test against engine ground. Perform cylinder compression pressure test. Check if sparks Weak sparks, no spark at all Low compression pressure or no pressure Re-start by following the starting procedures No ignition There are some signs of ignition, nut engine can not be started Remove the spark plug again and check it. Remove carburetor after 30 minutes and connect a hose onto fuel rich circuit. Then blow the hose with air Dry spark plug Wet spark plug Blowing in normal Blowing clogged 1. No fuel in fuel tank 2. Check if the pipes, fuel tank to carburetor and intake vacuum, are clogged. 3. Float valve clogged 4. Lines in fuel tank evaporation system clogged 5. Malfunction of fuel pump 6. Loosen or damaged fuel pump vacuum hose 7. Fuel filter clogged 1. Malfunction of spark plug 2. Spark plug foul 3. Malfunction of CDI set 4. Malfunction of AC generator 5. Ignition coil is in open or short circuit 6. Ignition coil leads open or short circuit 7. Malfunction of main switch 1. Piston ring seized 2. Malfunction of cylinder valves 3. Worn cylinder and piston ring 4. Cylinder gasket leak 5. Sand hole in compression parts 1. Malfunction of throttle valve operation 2. Air sucked into intake manifold 3. Incorrect ignition timing 1. Fuel level in carburetor too high 2. Malfunction of throttle valve operation 3. Throttle valve opening too wid

YAMAHA TW125 SERVICE MANUAL

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Filed Under (Yamaha) by admin on 19-11-2010

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Dimensions: Overall length Overall width Overall height Seat height Wheelbase Minimum ground clearance Minimum turning radius 2,140 mm , 810 mm 1,120 mm , 805 mm 1,330 mm , 260 mm 2,100 mm Basic weight: With oil and full fuel tank 125 kg Engine: Engine type Cylinder arrangement Displacement Bore stroke Compression ratio Compression pressure (STD) Starting system Lubrication system: Air-cooled 4-stroke, SOHC Forward-inclined single cylinder 0.124 L (124 cm3) 57.0 48.8 mm 10.0 : 1 1,200 kPa (12.0 kg/cm2, 12.0 bar) at 1,000 r/min Electric starter Wet sump Oil type or grade: Engine oil API standard: “SE” or higher grade ACEA standard: G4 or G5 Periodic oil change With oil filter replacement Total amount 1.0 L 1.1 L 1.3 L Air filter: Wet type element Fuel: Type Fuel tank capacity Fuel reserve capacity Regular unleaded gasoline 7.0 L 1.0 L 2-2 GENERAL SPECIFICATIONS SPEC Model TW125 Carburetor: Type/quantity Manufacturer Y24P/1 TEIKEI Spark plug: Type Manufacturer Spark plug gap DR8EA NGK 0.6 0.7 mm Clutch type: Wet, multiple-disc Transmission: Primary reduction system Primary reduction ratio Secondary reduction system Secondary reduction ratio Transmission type Operation Gear ratio 1st 2nd 3rd 4th 5th Spur gear 74/20 (3.700) Chain drive 50/14 (3.571) Constant mesh 5 speed Left foot operation 36/16 (2.250) 31/21 (1.476) 27/24 (1.125) 25/27 (0.926) 23/29 (0.793) Brake: Front brake type operation Rear brake type operation Single disc brake Right hand operation Drum brake Right foot operation Suspension: Front suspension Rear suspension Telescopic fork Swingarm (Monocross) Shock absorber: Front shock absorber Rear shock absorber Coil spring/Oil damper Coil gas spring/Oil damper Wheel travel: Front wheel travel Rear wheel travel 160 mm 150 mm Electrical: Ignition system Generator system Battery type Battery capacity C.D.I. C.D.I. magneto GM 7CZ-3D 12 V 7 AH Headlight type: Bulb type Bulb wattage quantity:

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