MSD Powersports Launch Master User manual

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.
Parts Included:
1 - Launch Master, PN 4351
MSD Powersports Launch Master
4-Cylinder, Two Coil, Wasted Spark
PN 4351
1 - Harness
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.
4-WIRE CONNECTOR
TAN (2) Signal Connections (Negative side of coils).
12-Volt Connection through this single Red wire (Positive side of coils).
RED
BLACK Connects to a good engine ground or the negative battery terminal.
BLUE Activation Wire. When grounded, the launch feature will be active. The harness
is supplied from MSD for a ground activation.
2-WIRE CONNECTOR
WHITE/BLUE 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.
WIRING
LED
The built-in LED will illuminate when the Launch Master is activated.
1 - Velcro strip 1 - Parts bag
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Figure 1 Wiring the Launch Master.
1. Locate stock coils.
2. The two tan wires connect to the negative side of the stock coils via butt connectors or
ring lugs supplied with PN 4351.
3. The red wire connects to one of the positive leads for the stock coil.
4. Turn the power on at this point to test to see if the wiring is correct. Ground the Blue
launch wire. If the LED turns on with the Blue wire grounded, the correct connections
were made. If the LED does not turn on, check the connection to the stock coils.
Note: Refer to your service manual for coil accessibility.
LAUNCH
MASTER
PN 4351
COIL COIL
(-) (-)
(+) (+)
TAN
TAN
RED
BLACK
GROUND
FOR 12V ACTIVATED LAUNCH
MOVE THE BLUE WIRE TO ALIGN
WITH THE WHITE/BLUE WIRE ON
THE CONTROLLER (FIGURE 2).
FACTORY HARNESS
2 INSTALLATION INSTRUCTIONS
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Figure 2 Wiring the Launch Activation Wire.
CONNECTING THE LAUNCH WIRE
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).
CONFIRM INSTALLATION
With the power ON, activate the clutch switch. When everything is correct, the LED will illuminate. To
verify the rpm, set the limit at a lower rpm, such as 3,000, and test the system.
If the engine has trouble starting or running, check the following:
• Ground connection
• Coil connections
Note: Due to safety controls on some applications, the launch rpm limit may be activated when the
bike is in neutral or when the kickstand is down.
Lift and remove the purple lock
with a small screwdriver.
Lift the tab and pull on pin
to remove.
Insert Blue wire in slot 'B'.
Reinstall purple lock.
PIN SWAP FOR 12V ACTIVATION
FOR 12 V ACTIVATED LAUNCH
MOVE THE BLUE WIRE TO ALIGN
WITH THE WHITE/BLUE WIRE ON
THE CONTROLLER
LAUNCH
MASTER
PN 4351 TAN
TAN
RED
BLACK
GROUND
INSTALLATION INSTRUCTIONS 3
MSD POWERSPORTS • WWW.MSDPOWERSPORTS.COM • [phone] • FAX [phone]

MSD POWERSPORTS • WWW.MSDPOWERSPORTS.COM • [phone] • FAX [phone]
© 2014 MSD LLC
FRM28378 Revised 01/14 Printed in U.S.A.
Limited Warranty
M SD warrants this product to be free from defects in material and workmanship under its intended normal use*,
when properly installed and purchased from an authorized MSD dealer, for a period of one year from the date of
the original purchase. This warranty is void for any products purchased through auction websites. If found to be
defective as mentioned above, it will be repaired or replaced at the option of MSD. Any item that is covered under
this warranty will be returned free of charge using Ground shipping methods.
This shall constitute the sole remedy of the purchaser and the sole liability of MSD. To the extent permitted by
law, the foregoing is exclusive and in lieu of all other warranties or representation whether expressed or implied,
including any implied warranty of merchantability or fitness. In no event shall MSD or its suppliers be liable for special
or consequential damages.
*Intended normal use means that this item is being used as was originally intended and for the original application
as sold by MSD. Any modifications to this item or if it is used on an application other than what MSD markets the
product, the warranty will be void. 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.
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 warranty service, Proof of Purchase must be supplied for verification. After
the warranty period has expired, repair service is based on a minimum and maximum fee.
All returns must have a Return Material Authorization (RMA) number issued to them before
being returned. To obtain an RMA number please contact MSD Customer Service at 1 (888) MSD-7859 or visit
our website at www.msdperformance.com/rma to automatically obtain a number and shipping information.
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 using Ground shipping methods (ground shipping is covered
by warranty). For more information, call MSD at [phone]. MSD technicians are available from 7:00 a.m. to
5:00 p.m. Monday - Friday (mountain time).
TECH NOTES
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