WINDSHIELDS & FAIRINGS AUDIO, COMMUNICATION & MOUNTS SADDLEBAGS & LUGGAGE SEATS & SISSY BARS FUEL/AIR SYSTEMS EXHAUST TRANSMISSION & DRIVELINE ENGINE GASKETS & SEALS LIGHTING ELECTRICAL HANDLEBARS, CONTROLS & MIRRORS CABLES TANKS & OIL FILTERS BRAKES DASHES & GAUGES FENDERS & LICENSE PLATE FRAMES HARDWARE, COVERS & GENERAL FRAMES & SUSPENSION FOOTRESTS & FLOORBOARDS WHEELS & AXLES SECTION 10 All part numbers in BLUE are new for 2025. See OLDBOOK For Early Model Applications 745 DISCLAIMER: *EMIS (EMISSIONS CATEGORIZATION CODE). SEE PAGES 5-7 FOR CATEGORY CODES, IMPORTANT EPA/CARB EMISSION DEFINITIONS AND REGULATORY COMPLIANCE AND NOTICE REGARDING NOISE REGULATIONS. PRODUCTS NOT LEGAL FOR SALE OR USE IN CALIFORNIA ON ANY POLLUTION CONTROLLED MOTOR VEHICLES IF NOT CATEGORIZED AS “1” OR “4”. APPLICATION CHART FOR DYNA COILS WHEN USING DYNA “S” IGNITION SYSTEMS DESCRIPTION DESCRIPTION PART # W/ single-plug heads Street, 5-ohms (black), pair DC10-1 W/ single-plug heads Race only, 3-ohms (green), pair DC3-1 W/ dual-plug heads Street, 5-ohms (black), pair DC8-1 DESCRIPTION DESCRIPTION PART # W/ dual-plug heads Race only, 3-ohms (green), pair DC1-1 W/ dual-plug heads Race only, requires two coils, 3-ohms (green), each DC6-1 PART # DESCRIPTION DS6-2 For 86-03 XL using a mechanical advance unit SINGLE-FIRE ELECTRONIC IGNITION SYSTEM •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 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; bikes with hotter cams show the greatest improvement •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 •Made in the U.S.A. NOTE: Not recommended for use with OEM coils. NOTE: An advance weight mechanism is required. NOTE: This unit must be used with special Dyna coils; see coil chart for correct coils. NOTE: Tach adapter is required when using an electric tach. NOTE: Not for use on Twin Cam. DS6-2
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