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BIG TWIN MOTORCYCLES

Part No. 556

INSTALLATION INSTRUCTIONS

FORM 1411 (REV. D) 8/08

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 begin-

ning of the compression stroke. Locate the timing hole. Continue

rotating the engine until the advance mark is visible through the

timing hole.

Step 2

Remove the ground cable from the battery. Remove the point wire at

the coil. Remove the point distributor.

WITH THIS DISTRIBUTOR REQUIRES 7-16 VOLTS, A 12 VOLT ELECTRICAL SYSTEM IS

ALSO REQUIRED.

IMPORTANT

FIGURE A

BUTTON HEAD SCREW, 3 PLACES

TOP

GROMMET

ADVANCE ASSEMBLY

INCLUDES YH ADVANCE

AND DISTRIBUTOR SHAFT

HOUSING ASSEMBLY

SHUTTER WHEEL

THRUST WASHER

GEAR

O-RING

ROLL PIN

.010" END PLAY

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.

An optional spring kit (PN 29014) is available for this distributor.

The kit gives you a choice of 14 different advance curve settings.