Zipper's Performance 317-105 - Manual

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 1
Installation Instructions for Internal
Ignition Part No. 317-105
CAUTION: CAREFULLY READ INSTRUCTIONS BEFORE PROCEEDING
OVERVIEW
Zipper's Internal Ignition Part No. 317-105 is
intended for use with Harley-Davidson  Evolution  type
motorcycle engines. The Zipper's Internal Ignition
replaces the original equipment (OE) electronic ignition
system on 1978-99 models. The unit mounts in the
gear case cover and uses the standard H-D
 timing
rotor. It can also be used on earlier models with
breaker points and mechanical advance.
The Zipper's Internal Ignition offers adjustable
advance, adjustable RPM limit settings in 100 RPM
increments, and switch selectable single or dual fire
modes. Single fire mode improves starting, reduces the
occurrence of backfiring at low RPM, and improves
power at high RPM. A red status LED flashes when the
engine reaches top dead center (TDC) and allows easy
static timing. The status LED also provides diagnostic
information. A green VOES LED illuminates when the
VOES (vacuum switch) input is active.
A special feature allows use of the tachometer
wire for a PC link to a laptop computer when the
engine is not running. Individual units can be
programmed with a custom advance curve and other
engine parameters such as rear cylinder timing offset.
The use of the tachometer wire for the PC link
eliminates the need to remove the outer cover plate.
All 317-105 units log engine operating data that
may be downloaded and viewed with our Operating
Statistics software. Units manufactured starting
January, 2006 include a build-in temperature sensor
and logging of temperature data.
AVOIDING HEAT RELATED
FAILURES
Heat kills electronics. The 317-105 uses
electronic devices rated for operation at 105 deg C
(221 deg F), the highest rating available. The unit can
tolerate somewhat higher temperatures, but exposure
to temperatures above 125 deg C (257 deg F) will
greatly reduce life expectancy. We sometimes see
problematic applications where several module failures
have occurred. The failure mode is a classic thermal
intermittent where the module stops firing one cylinder
when it gets hot. We have found that these problematic
applications share one or more of the following
characteristics:
• VOES switch removed or non-functional. All street
driven engines require vacuum advance. Without
vacuum advance at idle and part throttle,
thermodynamic efficiency is reduced and engine
temperatures increase significantly.
• Improper carburetor jetting resulting in lean air/fuel
ratio (AFR). A lean AFR will cause the engine to
run very hot. All performance engine modifications
necessitate carburetor rejetting. Carburetors are
never correctly jetted out-of-the-box. The only
practical means of correctly jetting a carburetor is
to test the motorcycle on a chassis dyno equipped
with an exhaust gas sniffer.
• Lack of an oil cooler on a 95 CID or larger engine.
• Exhaust pipe without heat shield in close proximity
to the nose cone.
If any of the above applies to your application,
the 317-105 may be exposed to excessive
temperatures resulting in reduced life expectancy. We
suggest that you use our Operating Statistics software
to monitor temperature levels. If excessive
temperatures are encountered and cannot be
remedied, you should consider using an external
module.
INCLUDED AND ADDITIONAL
REQUIRED PARTS
All units include a parts bag with crimp terminals
for coil and VOES hookup and a Packard Weather
Pack connector set intended for installation on the
tachometer wire to provide an access point for the PC
link.
FL series Big-Twin  models manufactured prior
to 1985, FX series Big-Twin  and XL Series Sportster 
models manufactured prior to 1984, and all models
with original equipment breaker points will require H-D

timing rotor P/N 32402-83 or an equivalent aftermarket
part.