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INSTALLATION INSTRUCTIONS

®

FORM 1306 (REV. B) 05/01

HARLEY-DAVIDSON

Part No. 554

APPLICATIONS: 1970-78 Big Twin

All 1979-Later Big Twin models which have been

converted to mechanical advance and points

NOTES

fire system.

2) Any coil or combination of coils with a total primary resistance of

at least 2.0 ohms may be used. The use of coil with 2.0-3.0 ohms

is recommended for racing applications to obtain maximum spark

energy. A 3.0-4.0 ohm coil is recommended for street use to keep

from 4.0-5.0 ohms can be used but may reduce performance, even

in street applications.

3) Check that the charging system is producing no more than 16

volts.

4) Do not use solid metal core spark plug wires. Use spiral-core

wires or carbon core. Spiral-core wires are preferable for racing

and performance applications.

INSTALLATION (See Figures 1, 2, 3, and 4)

1) Turn ignition switch to the OFF position. Disconnect the ground

cable from the battery.

2) Disconnect the wire at the coil which runs down to the points.

Remove the point cover plate.

3) Note the position of the slots in the point plate. When the Mallory

mate the timing.

4) Remove the wire to the points. Remove the O.E. standoffs and

washers. Remove the point plate assembly.

5) Remove the O.E. cam sleeve from the advance assembly. Place

a small amount of oil on the advance shaft which supported the

cam sleeve.

6) Slide the Mallory shutter wheel onto the advance shaft. Make sure

the shutter wheel is all the way down into the advance assembly

(it will only go one way due to the roll pin in the advance

assembly).

7) Install the advance and shutter wheel into the nose cone. Make

sure that the pin on the bottom of the advance engages the slot on

the end of the camshaft. Apply Loctite to the threads and install

the advance bolt. Torque to 25 in.lb.

8) Rotate the shutter wheel by hand (counter-clockwise) and release.

It should rotate about 10 degrees and "snap" back when released.

9) Install the two Mallory standoffs. Place Loctite on the threads and

torque to 16 in.lb. Do not use any washers with the standoffs.

hole in the nose cone housing. (The module goes in towards the

advance assembly with the flat plate outward). Pull on the three

wires to remove any slack and prevent the wires from rubbing on

the shutter wheel.

in the same position as the point plate was. This should make the

timing close enough to start the engine. Slide the two Mallory 8-32

male threads of the Mallory standoffs. Tighten the sleeve nuts just

enough to prevent the plate from moving.

carefully avoiding the exhaust system. Connect the red wire to the

positive (+) terminal (12 volts) on the coil. Connect the green wire

to the negative (–) terminal on the coil (where the point wire was

connected). Connect the brown wire to ground. The best place for

the brown wire is the negative (–) post on the battery, however,

any part of the frame or engine which is grounded to the battery

will work.

WARNING!

Before re-connecting the battery cable, recheck all 3 of the wires from

ule will be destroyed when the ignition is placed in the ON position.

plate and carefully rotate the shutter wheel to make sure that the

advance is not bound up. The wheel should rotate about 10 de-

grees counter-clockwise and snap back when released. If the ad-

the source of the interference before proceeding.

16) Follow a factory shop manual to set the timing for your particular

engine. Loosen the two Mallory 8-32 sleeve nuts to rotate the

clockwise advances the timing, counter-clockwise retards.

17) After the timing is set, tighten the two sleeve nuts to prevent the

plate in place.