Page 623 - Oldbook 2017

IRONHEAD XL

SEATS &
SINGLE-FIRE 12V ELECTRONIC IGNITION SYSTEM SISSY BARS
•All the features of the famous Dyna “S”, plus the special feature of firing the front
and rear cylinders independent of each other, allowing a much more accurate
timing of each cylinder
•The stock ignition system fires both cylinders at the same time, which works fine for EXHAUST
the front cylinder but the rear receives the “wasted” spark when the cylinder has
started its intake stroke; this can result in harder starting, increased engine vibration,
backfire and raw fuel being spit back into the carb, all creating a power loss
•Dyno and top‑speed testing have shown a dramatic improvement in power in all areas; CARBURETORS
bikes with hotter cams show the greatest improvement & AIR FILTERS
•If you truly want to get the most out of your stock, slightly modified or all‑out
customized Harley‑Davidson, you need a Dyna “S” single‑fire ignition system
NOTE: Not recommended for use with OEM coils.
NOTE: On 80-up XL models, an advance weight mechanism is required. ENGINE
NOTE: This unit must be used with special Dyna coils; see coil applications.
NOTE: Tach adapter is required when using an electric tach; PART # DESCRIPTION
see page 723 for PART #D-101. DS6‑2 For 71‑85 XL using a mechanical advance assembly
TRANSMISSION
& DRIVELINE

12V DUAL-FIRE ELECTRONIC IGNITION SYSTEM
•Perfect ignition timing once and for all GASKETS
•Self‑contained ignition system features Hall Effect magnetic sensors, & SEALS
which are not sensitive to rpm changes or affected by dirt and oil
•Improves overall performance by changing timing less than 3 degrees,
extends plug life, eliminates the use of points and condensers;
can be easily installed ELECTRICAL
•Used and endorsed by many championship racers & LIGHTING
•Requires the use of a mechanical advance unit PART # DESCRIPTION
NOTE: Not recommended for use with OEM coils. DS6‑1 For 71‑85 XL
HANDLEBARS,
HI-4N IGNITION MODULE KITS CONTROLS &
•More power than the stock ignition MIRRORS
•Single‑fire and dual‑fire function built into a single module
•All‑metal housing provides improved heat dissipation
•Ignition advance and timing degree markings are on the metal flange
•Convenient cable notch in the housing makes installation easier and CABLES
prevents damage to the cable
•Sensor and magnet housings are built into the all‑metal back plate to
protect the sensors from damage during installation
•Sensor housings contain advanced flux concentrators with
high‑temperature‑resistant samarium/ cobalt magnets for accurate, 2101‑0346 BRAKES
reliable ignition triggering
•Electronics are fully enclosed to resist vibration, moisture and dirt
•All electronics are mounted directly to the metal housing, which acts
as a heat sink OIL TANKS,
•Four rotary switches for ignition mode selection, advance rate, and rev limit 2101‑0345 FILTERS &
•Switches provide accurate, repeatable settings GAS TANKS
•PART #2101‑0345 includes HI‑4N ignition module only;
PART #2101‑0346 includes ignition module, S&S ignition coil and PART # DESCRIPTION
correct‑length spark plug wires FOR 70‑85 XL
•Require timing rotor OEM # 32402‑83 (not included) 2101‑0346 HI‑4N ignition module, ignition coil and plug wires DASHES
•Made in the U.S.A. 2101‑0345 HI‑4N ignition module only & GAUGES

CHASSIS,
SUSPENSION,
ELITE 1 IGNITION MODULE DS‑242319 FENDERS
•All electronics mounted in the nose cone & WHEELS
(timing cover) SINGLE- OR
•Feature selectable advance curves (eight advance DUAL-FIRE FLOORBOARDS
curves in either dual‑ or single‑fire operation) & PEGS
•Adjustable rpm limiter (eight rpm limits) IGNITION MODULE
•Dual‑range VOES operation DS‑242332 •For use in single‑ or dual‑fire
•Accu‑Ray light for easy installation and check system applications with proper coil
•Must use tach adapter PART #DS‑242332 with single‑fire systems •Features adjustable rev limiter
•Made in the U.S.A. and 15% advance curves HARDWARE
PART # DESCRIPTION •Uses stock rotor cup OEM #32402‑83
FOR 71‑85 XL or PART #2101‑0234
DS‑242319 For stock or slightly modified engines (works w/ VOES) •Requires graphite plug wires and resistor
DS‑242371 For stock or slightly modified engines w/ kick starter (works w/ VOES) spark plugs
DS‑242339 For race motors w/ NOS systems and turbos (w/o VOES) •Made in the U.S.A. GENERAL
TACH ADAPTER PART # DESCRIPTION
DS‑242332 Tachometer adapter for single‑fire Compu‑Fire ignitions 7805‑1040 For 71‑85 XL

ALL PART NUMBERS IN BLUE ARE NEW 621