MSD MC-2 MOTORCYCLE IGNITION
Contents
1. COIL A terminals One to coil negative the other to positive It does not matter which wire Connects to the back coil COIL B terminals One to coil negative the other to positive It does not matter which wire AUTOTRONIC CONTROLS CORPORATION e 12120 ESTHER LAMA SUITE 114 EL PASO TEXAS 79936 915 857 5200 FAX 915 858 9241 INSTALLATION INSTRUCTIONS 3 WIRING TO THE STOCK IGNITION SYSTEM Note The MC 2 will not work with Capacitive Discharge Ignitions or 4 cylinder engines with an individual coil per cylinder The Yamaha V Max is one bike that cannot accept an MC 2 Note The factory rev limiter and timing curve will still function with the MSD installed To disable the factory rev limiter and timing curve an aftermarket stand alone trigger amplifier is required 1 Locate the ignition coils and identify which side of the coil s has 12 volts going to it If the polarity of the coil is not identified follow this procedure Figure 2 A Disconnect the coil wires and remove them from the terminals Note Make sure they do not make contact with any engine components B Using a voltmeter connected to one wire and to ground turn the ignition to the On position and check for 12 volts NOTE DISCONNECT WIRE FROM COIL BEFORE CHECKING FOR 12 VOLTS REAR COIL GREEN TO STOCK TO STOCK WIRING HARNESS WIRING HARNESS Figure 2 Checking for Coil Wire Polarity Note If 12 volts is not present on either coil2. MSD MC 2 MOTORCYCLE IGNITION PN 4220 The MSD MC 2 Ignition can be used on 2 or 4 cylinder engines using two coils The MC 2 will operate with conventional points or from the amplifier of an electronic breakerless system Capacitive discharge units cannot trigger the MSD WARNING During installation always disconnect the battery cables When disconnecting the battery always remove the Negative cable first and install it last Note The MSD MC 2 will not work with capacitive discharge motorcycles Parts Included 1 MSD MC 2 Ignition Control Unit 1 Motorcycle Cable Assembly PN 4211 6 RPM Modules 5 000 7 000 9 000 10 000 11 000 12 000 rpm 4 Vibration Mounts PN 8823 1 Parts Bag Note It is recommended that you have the Service Manual for your motorcycle to install the MSD MC 2 Ignition TECH TIPS The following are technical tips that will help you get the most out of your MSD MC 2 Ignition Battery The battery is a very important component of your ignition system The battery should be rated at no less than 10 amp hours whether you have a charging system or not If you do not have a charging system allow at least 9 amp hours per each 1 2 hour of use Never start or run the engine while a battery charger is connected Some chargers can produce voltage spikes that may damage the ignition components Coils The MSD MC 2 will work with factory and most aftermarket coils Better spark energy is received
3. Installing an MSD Tach Adaptor TACHOMETER OUTPUT The MC 2 Ignition has a built in tach output terminal Figure 8 This terminal will directly drive many models of tachs The LIGHT BLUE output combines both input BROWN signals from either the points or BLACK eter ite fee a s RED electronic ignition amplifier into one signal Due to this it is possible for some tachs to read double the engine rpm If the rpm reading is doubled when using the tach output terminal TACHOMETER OUTPUT TERMINAL splice the tach wire into either the WHITE or the single GREEN wire Figure 8 Tachometer Output Terminal SHIFT LIGHT A Shift Light can easily be connected to the MC 2 Figure 9 shows a common setup with an MSD Shift Light IGNITION SWITCH SHIFT LIGHT PN 8952 Figure 9 Wiring an MSD Shift Light AUTOTRONIC CONTROLS CORPORATION e 12120 ESTHER LAMA SUITE 114 EL PASO TEXAS 79936 915 857 5200 FAX 915 858 9241 8 INSTALLATION INSTRUCTIONS PROGRAMMING SHIFT INTERRUPT FEATURE The MC 2 Ignition has a special Shift Interrupt feature When applied the ignition output will be interrupted thereby unloading the trans mission and allowing the shift to occur This system is different than normal ignition kills which simply interrupt the power to the coils causing a spark to occur at the time the switch is released which may result in severe backfires The MC 2 Interrupt feature only operates in the output se
4. the negative terminals It should be 1 2 1 4 ohms Secondary Resistance Check the resistance between the spark plug terminals It should be 11 000 11 500 ohms 11K 11 5K If either measurement is out of specification the coil must be replaced AUTOTRONIC CONTROLS CORPORATION e 12120 ESTHER LAMA SUITE 114 EL PASO TEXAS 79936 915 857 5200 FAX 915 858 9241 INSTALLATION INSTRUCTIONS 11 Notes AUTOTRONIC CONTROLS CORPORATION e 12120 ESTHER LAMA SUITE 114 EL PASO TEXAS 79936 915 857 5200 FAX 915 858 9241 Notes Service In case of malfunction this MSD component will be repaired free of charge according to the terms of the warranty When returning MSD components for service Proof of Purchase must be supplied for warranty verification After the warranty period has expired repair service is charged based on a minimum and maximum charge Send the unit prepaid with proof of purchase to the attention of Customer Service Department Autotronic Controls Corporation 12120 Esther Lama Suite 114 El Paso Texas 79936 When returning the unit for repair leave all wires at the length in which you have them installed Be sure to include a detailed account of any problems experienced and what components and accessories are installed on the vehicle The repaired unit will be returned as soon as possible after receipt COD for any charges Shipping is covered by warranty All units are returned regular UPS unless o
5. wire the motorcycle may have a Capacitive Discharge Ignition and cannot use an MSD MC 2 C The wire that shows 12 volts is the positive side Turn the ignition Off and mark that coil wire as positive and the other as negative If necessary mark which wires go to the front and rear coils 2 At this point all of the coil wires should be marked with its polarity and which coil front or rear the wires connect to Single Coil Attach the coil s negative wire to the White wire of the MSD Figure 3 Dual Coils Attach the front coil s Coil A negative wire to the White wire of the MSD and the rear coil Coil B negative wire to the Green wire of the MSD Figure 4 AUTOTRONIC CONTROLS CORPORATION e 12120 ESTHER LAMA SUITE 114 EL PASO TEXAS 79936 915 857 5200 FAX 915 858 9241 4 INSTALLATION INSTRUCTIONS 3 Connect the MSD Gray wires to the coil s positive wires Note The MSD has two Gray wires and it doesn t matter which wire s connect to which coil in dual coil applications For single coil installation connect both Gray wires to the original coil positive wire These wires provide a switched 12 volt source to turn the MSD on and off 4 The following wires connect directly to the coil terminals The MSD Black and Purple wires connect to the front coil Coil A The Orange and Yellow wires attach to the rear coil Coil B It does not matter which side of the coil the wires connect to If you only have a single coil se
6. NS ORANGE WHITE a TRIGGER A WIRE SWITCHED 12V FROM IGNITION SWITCH Figure 6 Wiring the MC 2 to an Aftermarket Amplifier Trigger INITIAL START UP Before starting the engine review the wiring steps and make sure all of your connections are tight and secure Make sure the spark plug wires are installed and the battery terminals are tight then start the engine Ifthe engine runs a short time then stalls the engine may be equipped with an electric fuel pump relay and might require an MSD Tach Adaptor PN 8920 Contact MSD for information After wiring the MC 2 take time to review these steps e The only wires on the coils should be the PURPLE BLACK and ORANGE YELLOW wires DO NOT hook any other wires to the coils e The GRAY wires should be connected to a switched 12 volt source allowing the system to be turned on and off by the ignition switch TACH ADAPTOR INSTALLATION If the engine started then stalled within a couple minutes you will have to install an MSD Tach Adaptor PN 8920 The cause for this is due to the fuel pump not receiving a strong enough trigger signal through the MSD The Tach Adaptor ensures that the fuel pump receives a strong trigger signal Figure 7 AUTOTRONIC CONTROLS CORPORATION e 12120 ESTHER LAMA SUITE 114 EL PASO TEXAS 79936 915 857 5200 FAX 915 858 9241 INSTALLATION INSTRUCTIONS 7 TACH TERMINAL FUEL PUMP RELAY TRIGGER WIRE CAIRO STOCK COIL TO FUEL PUMP Figure 7
7. al the ends of the Orange and Yellow wires 5 Review your wiring with Figure 3 or 4 and make any corrections If everything matches connect the heavy Red wire to the battery positive terminal and the heavy Black wire to the negative battery terminal The wiring is complete ORIGINAL COILO ORIGINAL COIL PURPLE GRAY m W wo 2 5 2 3 a a w gt ORANGE NOT USED GREEN NOT USED Figure 3 Wiring to a Stock Single Coil System AUTOTRONIC CONTROLS CORPORATION e 12120 ESTHER LAMA SUITE 114 EL PASO TEXAS 79936 915 857 5200 FAX 915 858 9241 INSTALLATION INSTRUCTIONS 5 ORIGINAL COIL ORIGINAL COIL FRONT WHITE REAR GREEN ORIGINAL COIL NT J REAR ORANGE PURPLE YELLOW L Li BATTERY Figure 4 Wiring to a Stock Dual Coil Ignition System AFTERMARKET AMPLIFIER TRIGGER By using an aftermarket amplifier trigger system on some bikes the factory timing curve and rev limit may be bypassed Use the same wiring procedure as described in the Wiring to a Stock Ignition section Figures 5 and 6 show a typical aftermarket amplifier trigger TO IGNITION SWITCH TRIGGER B WIRE TRIGGER A WIRE SWITCHED 12V NOTE DO NOT USE THE MC 2 WITH AFTERMARKET CDI IGNITIONS Figure 5 Typical Aftermarket Amplifier Trigger without MC 2 AUTOTRONIC CONTROLS CORPORATION e 12120 ESTHER LAMA SUITE 114 EL PASO TEXAS 79936 915 857 5200 FAX 915 858 9241 6 INSTALLATION INSTRUCTIO
8. at the plug if lower resistance coils are used 1 5 ohm However for maximum ignition output an MSD Motorcycle Coil PN 8204 is recommended The MSD coil is designed specifically for use with the MC 2 Ignition It has less resistance and a high turns ratio to match the full capability of the MC 2 WARNING Do not touch or connect any test equipment accessories etc to the coil terminals Spark Plugs The increased spark energy of the MC 2 allows you to run a wider spark plug gap 045 060 The result is more predictable ignition and improved performance Spark Plug Wires Only magnetic suppression wires should be used with the MC 2 Ignition Magnetic suppression wires such as the MSD Heli Core wires suppress radio frequency interference RFI that is emitted If not suppressed this RFI noise may interfere with any electronic components on the motorcycle DO NOT use Solid Core wires AUTOTRONIC CONTROLS CORPORATION e 12120 ESTHER LAMA SUITE 114 EL PASO TEXAS 79936 915 857 5200 FAX 915 858 9241 2 INSTALLATION INSTRUCTIONS CYLINDER SELECT The MC 2 is programmed at the factory for 4 cylinder four stroke or 2 cylinder two stroke engines To program the unit for different applications see the chart in Figure 1 BLUE WIRE LOOP Eran FOUR STROKE TWO STROKE CUT LOOP CUT LOOP Multiple cai CUT LOOP NO MODIFICATIONS SI k Figure 1 Cylinder Select Wire Loop MOUNTING The MC 2 Ignition Uni
9. ction of the ignition allowing all of the timing functions to keep operating properly This ensures that no backfires will occur To incorporate the Interrupt feature connect the BROWN wire of the MC 2 to the Normally Open NO terminal of the Shift Kill switch Wire the common C terminal of the switch to ground Figure 10 Figure 10 Wiring the Air Shift Interrupt Feature THE TWO STEP MODULE The Two Step feature of the MC 2 provides the capability of switching between two rpm limits that are set using plug in modules To use the Two Step feature connect the LIGHT BLUE wire to a switched ground see Figure 11 When the LIGHT BLUE wire is grounded module one the low limit is engaged When the LIGHT BLUE wire is not grounded open module two the high rpm limit is engaged Choose the rom module you wish to set at low rpm and insert it in the LOW module holder bottom Insert the high rpm module for over rev protection in the HIGH holder NORMALLY OPEN CLUTCH SWITCH GROUND LIGHT BLUE WIRE w BLUE WIRE LOOP Figure 11 Wiring the Two Step Module Selector AUTOTRONIC CONTROLS CORPORATION 12120 ESTHER LAMA SUITE 114 EL PASO TEXAS 79936 915 857 5200 FAX 915 858 9241 INSTALLATION INSTRUCTIONS 9 MSD offers additional rom modules in sets of five or an adjustable module selector The module selector is an adjustable knob that provides several rpm settings for even easier adjustment The module ki
10. ed Also check that the MSD power leads are connected properly and are tight e Check that the only wires connected to the coil s are from the MSD WARNING Do not connect any test equipment to the coil terminals After checking the wiring for loose or faulty connections follow the next procedure to confirm that the MSD is sparking properly CHECKING FOR SPARK The following procedure will determine if the ignition is producing a spark 1 With the ignition Off remove one of the plug wires from the spark plug Use a spark tester tool such as the ST 125 or position the wire so the terminal is about 1 2 from ground 2 Disconnect the White wire of the MSD 3 Turn the ignition On DO NOT CRANK THE ENGINE 4 Tap the White wire to ground several times A spark should jump to ground when the wire is removed from ground If it sparks the ignition is operating properly Repeat the procedure with the Green wire if your engine has two coils 5 No Spark Substitute another coil and test again If there is still no spark and all of the wiring and connections have been inspected and confirmed contact the MSD Customer Service Line to send the unit in for repair CHECKING THE COIL Using an Ohm meter you can check the resistance of the coil s The following specifications are for MSD s PN 8204 Motorcycle Coil Check your Service Manual for stock coil specifications Primary Resistance Check the resistance between the positive and
11. t may be mounted in any position The unit should be mounted at least one inch from the exhaust pipes to avoid excessive heat The suggested location is ahead of the engine at the top of the down tubes Make sure the mounting location does not interfere with the normal operation of the motorcycle To mount the MC 2 use it as a template and mark the mounting hole locations Drill the four holes using a 3 16 drill and install the four vibration mounts and the MC 2 WIRING WIRE FUNCTIONS The following chart describes what each wire of the MC 2 is used for RE Connects directly to the battery positive terminal or starter 12 volt solenoid terminal BLACK Connects to the battery negative terminal or the engine ground GRAY nects to switched 12 volt side of ignition switch It switches the input tage from the RED wire on and off nects to the COIL A trigger wire from the points or electronic amplifier riggers the PURPLE and BLACK wired coil ED GREEN nnects to the B COIL trigger wire from points or electronic amplifier triggers the ORANGE and YELLOW wired coil BROWN Kills the engine when connected to ground LIGHT BLUE Activates the low rpm module when connected to ground BLU SHOR E Cylinder select wire loop LOOP The following groups of two wires connect to the same components in different applications Connects to the front coil
12. therwise noted For more information call the MSD Customer Service Line 915 857 5200 MSD technicians are available from 8 00 a m to 5 00 p m Monday Friday mountain time Limited Warranty Autotronic Controls Corporation warrants MSD Ignition products to be free from defects in material and workmanship under normal use and if properly installed for a period of one year from date of purchase If found to be defective as mentioned above it will be replaced or repaired if returned prepaid along with proof of date of purchase This shall constitute the sole remedy of the purchaser and the sole liability of Autotronic Controls Corporation To the extent permitted by law the foregoing is exclusive and in lieu of all other warranties or representations whether expressed or implied including any implied warranty of merchantability or fitness In no event shall Autotronic Controls Corporation be liable for special or consequential damages FRM17605 Revised 07 96 Printed In U S A
13. ts come in increments of 200 rpm within a range of 1 000 rpm Note If no rpm modules are used there will be no rpm limit 8743 3000 3200 3400 3600 3800 8749 9000 9200 9400 9600 9800 RETURNING TO STOCK IGNITION To return the ignition system back to standard operation points and standard electronic trigger systems only simply unplug the MC 2 control cable and insert the jumper plug Supplied into the cable connector If using high performance low resistance coils a 1 5 ohm ballast resistor must be wired into the GRAY wire going to the positive side of the coil Figure 12 Note In the event of having to run the motorcycle without a battery unplug the MC 2 and return to standard operation Operating without a battery could cause severe damage to the MC 2 8 PIN CONNECTOR BYPASS CONNECTOR Figure 12 Bypassing the MSD MC2 AUTOTRONIC CONTROLS CORPORATION e 12120 ESTHER LAMA SUITE 114 EL PASO TEXAS 79936 915 857 5200 FAX 915 858 9241 10 INSTALLATION INSTRUCTIONS TROUBLESHOOTING WIRING CHECK WARNING The MC 2 produces very high voltages Never short the battery or coil terminals Use caution when checking connections and while troubleshooting e Check all of the wiring connections making sure they are clean and tight If connectors have been crimped on make sure they are tight and sealed e Confirm that the battery is fully charged and properly connect
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