unilite® distributor for 1952-70 harley davidson® sportster

FORM 1479 (REV. A) 03/17
INSTALLATION INSTRUCTIONS
®
UNILITE® DISTRIBUTOR FOR
1952-70 HARLEY DAVIDSON®
SPORTSTER® MOTORCYCLES
Part No. 576
NOTE: THIS DISTRIBUTOR WILL ALSO FIT 1930-73 FLATHEAD (45 AND UL).
IMPORTANT
A 1952-70 Sportster® DISTRIBUTOR CLAMP (ORIGINAL OR AFTERMARKET) IS REQUIRED
TO INSTALL THIS DISTRIBUTOR. BECAUSE THE UNILITE® MODULE USED WITH THIS
DISTRIBUTOR REQUIRES 7-16 VOLTS, A 12 VOLT ELECTRICAL SYSTEM IS ALSO
REQUIRED.
GENERAL INFORMATION
Any coil or combination of coils with a total primary resistance of at least 2.0
ohms can be used with this distributor. We recommend a 2-3 ohm coil for
racing and a 3-4 ohm coil for street use. A coil with 4-5 ohms resistance may be
used. However, performance may be reduced, even in street applications.
NOTE: Check the charging system and make sure that it is producing no more
than 16 volts.
We recommend a spark plug gap of .040" when using a 2-3 ohm coil. A gap
of .030" is recommended when using a 3-4 ohm coil.
INSTALLATION
Step 1
Turn the ignition switch to the off position. With the point distributor still in place
and correctly timed, rotate the engine until the points begin to open on the front
cylinder lobe. The front cylinder lobe is the narrower of the two.
If the point distributor is not installed, rotate the engine to the beginning of
the compression stroke. Locate the timing hole. Continue rotating the engine
until the advance mark is visible through the timing hole.
An optional spring kit (PN 29014) is available for this distributor. The kit gives Step 2
Remove the ground cable from the battery. Remove the point wire at the coil.
you a choice of 14 different advance curve settings.
Remove the point distributor.
FIGURE A
ADAPTER RING
STANDOFF
SET SCREW
HOUSING
SCREW
O-RING
WASHER
ROLL PIN
SLEEVE NUT
UNILITE PLATE ASSY
SHAFT
COVER
YH ADVANCE
SHUTTER WHEEL
PIN
GROMMET
CONNECTOR
GEAR
Step 3
FIGURE B
Remove the cover from the Mallory distributor by removing the two screws.
Rotate the shaft until the arrow on the UNILITE® plate points approximately at
the "X" on the shutter wheel. Install the Mallory distributor in the engine. Be
sure that the distributor wires exit on the side closest to the cylinders.
Step 4
Install a distributor clamp. Do not tighten the clamp at this time.
Step 5
Rotate the distributor until the "X" on the shutter wheel lines up with the arrow
on the UNILITE® plate. Timing should now be close enought to start the engine.
Tighten the distributor clamp.
Step 6
Connect the wires (See Figures C and D).
Step 7
Replace the Mallory cover and install the two screws to hold it in place.
Start the engine and check the timing with a timing light. NOTE: When
checking the timing, engine RPM must be above 2000 for accurate timing
results.
FIGURE C
NOTE: Arrow and X in photo have been enlarged for clarity.
SINGLE PLUG HEADS
GREEN
RED
BROWN
2 TO 4 OHM
GROUND
12 VOLTS FROM IGNITION SWITCH
FIGURE D
DUAL PLUG HEADS
GREEN
RED
JUMPER
BROWN
1 TO 2 OHM
1 TO 2 OHM
GROUND
12 VOLTS FROM IGNITION SWITCH
MALLORY IS A DIVISION OF THE MR. GASKET PERFORMANCE
GROUP C/O HOLLEY PERFORMANCE PRODUCTS INC., 1801
RUSSELLVILLE RD, BOWLING GREEN, KY 42101
270-781-9741 1-866-464-6553
www.holley.com
FORM #1479
(REV. A) 03/17
Made in U.S.A.
Printed in U.S.A.
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