Zipper's Performance 317-105 - Manual (Page 8)

Zipper's Performance Products, 6655-A Amberton Dr., Elkridge, MD 21075 Internal Ignition Part No. 317-105
Tel: (410)-579-2828 Fax: (410)-579-2835
www.zippersperformance.com 7/2006
Page 8
Figure 8 - Front Cylinder Timing Marks
GENERAL RECOMMENDATIONS
Coil primary resistance must not be less than 3
ohms. Most OE style dual fire and aftermarket single
fire coils meet this requirement. Coils for the new Twin
Cam 88
 engine have low primary resistance and are
not compatible.
Due to the short lengths involved on motorcycle
applications, energy losses in spark plug wires are
insignificant. OE carbon core suppression cables will
deteriorate after several years. For a more durable
replacement, we suggest spiral core spark plug cables.
The Zipper’s module is compatible with all
modern "ground sensing" type tachometers including
H-D
 OE and Autometer units. The red status LED is
internally connected to the tachometer output. If the
red status LED blinks, the tachometer output should be
functional. Some early tachometers require a high
voltage trigger pulse. In this case, you will require a
commercially available tachometer adapter.
VOES CONSIDERATIONS
The vacuum switch (VOES) provides the
vacuum advance required by all street driven engines.
Additional advance under low manifold pressure
conditions improves idle stability and fuel economy.
Most 1980 and later motorcycles are equipped with a
OE VOES. Without vacuum advance at idle and part
throttle, thermodynamic efficiency is reduced and
engine temperatures increase significantly.
The VOES is normally open. At low manifold
pressure (or manifold vacuum greater than about 5
inch-Hg), the VOES grounds the purple/white wire and
causes the 317-105 module to generate additional
timing advance. The green VOES LED illuminates
whenever the VOES input is active (timing advanced).
The use of a VOES is required for proper
operation of the 317-105 module. If your motorcycle
did not include an OE VOES, you can use H-D
 VOES
P/N 26566-91 for stock or mildly modified engines.
PC LINK CABLE AND SOFTWARE
The new USB Interface (P/N 399-110) provides
PC connectivity for all of our engine controls and
eliminates the requirement for multiple cables or a
separate USB adapter. Two Windows based programs
are available for use with the 317-105: PC Link Evo for
programming custom advance curves and other engine
parameters and Operating Statistics for viewing engine
operating data. Refer to the software documentation
for details.
The brown tachometer wire is used for the PC
link. The PC link can access the 317-105 module when
the ignition is turned on and the engine has not yet
been started. Once the engine is started, the brown
wire resumes its normal function of driving the
tachometer. Note that no damage occurs if the engine
is inadvertently started while the PC link is still
attached.
EARLY STYLE
LATE STYLE
1996 AND LATER (1995 AND LATER EXPORT)
TDC 20° BTDC (NOT USED) 35° BTDC
TDC 35° BTDC
35° BTDC TDC
CAUTION: Do not use solid copper
spark plug cables or non-resistor type
spark plugs. The unit may misfire.