DRIVE TRAIN SECTION RED PART NUMBERS INDICATE NEW PARTS 7-119 1 2 3 4 5 6 7 8 9 10 11 CONTENTS ELECTRICAL FRAME FRONT END CONTROL WHEEL ENGINE DRIVE TRAIN FUEL EXHAUST GENERAL REFERENCE Big Twin & Milwaukee-Eight® Transmission Pulleys TRANSMISSION PULLEYS FOR BIG TWIN • An easy way to change the final drive ratio on your bike. • 30 tooth Power Pulleys provide a 6% higher gear ratio advantage. • 34 tooth Overdrive Pulleys provide for a 6% lower gear ratio advantage. • To minimize belt wear and maximize pulley life, these pulleys are all steel and designed with a 3/4” wide spline to help keep the pulley from working loose on the main drive gear. • All 1985/1993 pulley kits have new style spacer, lock ring, retainer bolts, and seals included as part of the kit. Pulley kits for 1994/2006 must use original stock seal and lock ring. • 2007/Later & 2006 Dyna must use original stock seal, spacer, & lock ring. Note: 1 tooth change on the transmission will move the rear axle approximately .125”. If you are changing the transmission pulley because your old one is worn out, always change the belt and rear pulley accordingly. BELT DRIVE TRANSMISSION PULLEYS FOR BIG TWIN 5 SPEED These economically priced all steel or aluminum pulleys will reduce the wear and tear on the fifth gear bearings, due to their lighter than OEM weight. Use the 32 tooth for OEM ratio replacement. If you are running a larger displacement motor that can handle higher gearing, or if you just want to lower your RPM on the highway, use a larger pulley. Steel Aluminum Description Part # Part # 30 Tooth Pulley 75265 ----- 32 Tooth Pulley 75267 75269 (Rpls. HD 40210-85) 34 Tooth Pulley 75268 ----- Fits Big Twin 1985/ Early 1994 BELT DRIVE TRANSMISSION PULLEYS FOR MILWAUKEE-EIGHT® • Change the final drive ratio on your Milwaukee-Eight®. • The final drive ratio of engine RPM to rear wheel RPM on any HD bike can be calculated as follows: Final Drive Ratio = (# clutch / # engine teeth) x (# rear wheel teeth / trans teeth). For M8 Baggers: FDR = 46 / 34 x 68 / 32 = 2.87 For M8 Softail: FDR = 46 / 34 x 66 / 32 = 2.79 • Sold each. Fitment Description Part # Milwaukee-Eight® All Models 31 Tooth Pulley 75284 2017/2018 (Power Pulley) 34 Tooth Pulley 75285 (Overdrive Pulley) • Lighter than the stock pulley. • Made in a permanent mold with 356 T6 aircraft quality aluminum. • Hard anodized teeth for longer pulley and belt life. • Made with a 3/4” wide spline and correct length spacer. Description Part # 29 Tooth 77358 32 Tooth (Rpls. HD 40250-94) 77357 33 Tooth 77356 34 Tooth 77355 BELT DRIVE TRANSMISSION PULLEY KITS FOR BIG TWIN 5 SPEED Fits Big Twin 1985/2005 Note: These pulleys retro fit the 1985/Early 1994 pulleys that only had a 7/16” wide spline and were notorious for working loose. Description Fits Part # 30 Tooth Big Twin 5 speed 1985/2006 75258 Power Pulley Big Twin 2007/Later & Dyna 2006 75261 34 Tooth Big Twin 5 speed 1985/2006 75244 Highway Pulley Big Twin 2007/Later & Dyna 2006 75262
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