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MSD Powersports Launch Master
4-Cylinder, Two Coil, Wasted Spark
Parts Included:
1 - Launch Master, PN 4351
Note: The Launch Master is a launch rpm limiter that will not provide nor modify any over-rev protection.
The stock high rpm rev-limiter will still be active.
The MSD Powersports Launch Master is a universal launch rpm limiter. The Launch Master will
provide consistent launches and quicker 60-foot times. RPM adjustments are made via two rotary
switches located on the harness side of the unit. The adjustment range is from 1,800 to 9,900 rpm,
in 100 and 1000 rpm increments. An LED will illuminate when the launch rev limit is active.
Note: It is recommended to have the service manual for your motorcycle.
MOUNTING
The Launch Master can be mounted in any position but keep in mind to mount it so the rotary dials
are accessible for adjustments. A section of Velcro is supplied for mounting. Double sided tape or
tie wraps are also recommended depending on the final mounting area. Before mounting the unit,
confirm that the wiring harnesses reach their connections.
TAN (2)
RED
BLACK
BLUE
WHITE/BLUE
LED
The built-in LED will illuminate when the Launch Master is activated.
MSD POWERSPORTS
1 - Harness
4-WIRE CONNECTOR
Signal Connections (Negative side of coils).
12-Volt Connection through this single Red wire (Positive side of coils).
Connects to a good engine ground or the negative battery terminal.
2-WIRE CONNECTOR
Activation Wire. When grounded, the launch feature will be active. The harness
is supplied from MSD for a ground activation.
Activation Wire. When switched to 12 volts, the launch feature will be active. (The
position of the blue wire on the connecting 3-pin harness must be moved.)
Note: Never connect both the Blue and White/Blue wires at the same time.
Note: The stock clutch lever or aftermarket clutch lever with momentary switch
can be used to activate the Launch Master.
• WWW.MSDPOWERSPORTS.COM • (915) 858-3365 • FAX (915) 858-3496
PN 4351
1 - Velcro strip
WIRING
1 - Parts bag
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Table of Contents
Summary of Contents for MSD Powersports Launch Master
- Page 1 Note: It is recommended to have the service manual for your motorcycle. MOUNTING The Launch Master can be mounted in any position but keep in mind to mount it so the rotary dials are accessible for adjustments. A section of Velcro is supplied for mounting. Double sided tape or tie wraps are also recommended depending on the final mounting area.
- Page 2 MOVE THE BLUE WIRE TO ALIGN WITH THE WHITE/BLUE WIRE ON THE CONTROLLER (FIGURE 2). LAUNCH MASTER PN 4351 BLACK GROUND COIL COIL FACTORY HARNESS Figure 1 Wiring the Launch Master. MSD POWERSPORTS • WWW.MSDPOWERSPORTS.COM • (915) 858-3365 • FAX (915) 858-3496...
- Page 3 Most motorcycles have a clutch switch that provides a ground when the clutch is engaged. This is the default wiring of the Launch Master. If you prefer to activate the launch limit with 12 volts, disas- semble the 2-pin connector and move the Blue wire to align and connect with the White/Blue wire (Figure 2).
- Page 4 It is the sole responsibility of the customer to determine that this item will work for the application they are intending. MSD will accept no liability for custom applications. MSD POWERSPORTS • WWW.MSDPOWERSPORTS.COM • (915) 858-3365 • FAX (915) 858-3496 ©...
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