INDEX 1 2 3 4 5 6 7 8 9 10 11 ELECTRICAL SECTION RED PART NUMBERS INDICATE NEW PARTS 1-92 CONTENTS REFERENCE GENERAL EXHAUST FUEL DRIVE TRAIN ENGINE WHEEL CONTROL FRONT END FRAME ELECTRICAL Mechanical Advance & Related TIMER PLATE STAND-OFFS FOR BIG TWIN & SPORTSTER • If you have ever had a timer plate stud (stand off) break off at the screw end in the gear cover, then you can realize the importance of a high quality pair. • These are machined from 17-4 stainless steel and are undeniably the very best available. • Sold in pairs. ADVANCE UNIT PARTS FOR BIG TWIN & SPORTSTER These Automatic Advance Unit Parts are the finest available as stock replacement parts. Use them with confidence. Lubricate pivot pins and shaft with high temp anti-seize 05090 upon assembly. Fits Big Twin 1970/1979 and Sportster 1971/1979. Shaft and Plate Unit (Rpls. HD 32629-70T) Part 17512 Part 17513F Points Cam 1970/Early 1978 (Rpls. HD 32542-70TA) Part 17514 Advance Weight Spring (Rpls. HD 32605-70T) Part 17534F Timer Screw (Rpls. HD 3570T) .760” Long Part 17516A Timer Plate Screw 1972/Early 1978 (Rpls. HD 32601-78) Advance Weight with roll pin (Rpls. HD 32522-70T) TUNEABLE MECHANICAL ADVANCE KIT FOR BIG TWIN & SPORTSTER Designed to outperform and outlast anything out there, this Tuneable Mechanical Advance Unit is the finest available. It features a heat treated stainless steel base, pre-lubricated heat treated weights, and three sets of color coded springs that allow you to select three different advance curves to meet your engine’s requirements. Fits Big Twin 1970/1979 and Sportster 1971/1979. Also fits aftermarket electronic ignition systems that require a mechanical advance unit. Tuneable Features: Black Spring - Allows full advance @ 1400 RPM (same as OEM) Silver Spring - Allows full advance @ 2000 RPM Gold Spring - A llows full advance @ 2600 RPM Advantages: Eliminating spark knock and detonation means longer engine life and more low end horsepower and torque. • The only mechanical advance unit kit that allows you to adjust your advance curve. • A must if you have performance work done. Even minor performance changes can require a different advance curve. Description Part # Tuneable Mechanical Advance Unit 17548 Black Spring allows full advance @ 1400 RPM 17534F (Same as OEM) Silver Spring allows full advance @ 2000 RPM 17559F Gold Spring allows full advance @ 2600 RPM 17558F Mechanical Advance Timer Screw 17513F 17548 Part 17511A PERFORMANCE MECHANICAL ADVANCE KIT FOR BIG TWIN & SPORTSTER • The shaft and plate are stainless steel machined to exact tolerances. • The weights are heat treated and coated with high-tech polymers to ensure smooth even advance and retract movement. • Included springs are high quality phosphate coated spring wire, that allows full advance @ 1400 RPM (same as OE). • Hardened washers on advance weight pivots to prevent premature spring wear. • Pre-lubricated. Part 17543 Fits Big Twin 1970/1979 & Sportster 1971/Early 1979 Note: Also fits aftermarket ignition systems that require a mechanical advance unit. Replacement & Tuneable Advance Weight Springs Description Part # Spring allows full advance @ 1400 RPM (same as OE) 17534F Spring allows full advance @ 2000 RPM 17559F Spring allows full advance @ 2600 RPM 17558F Unthreaded Section of Description Rpls. HD Stand-off Length Part # Big Twin 1970/1999 32606-82 .700” 17508 (except Twin Cam) & 32601-78 .760” 17509 Sportster 1971/2003 High Strength
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