Custom Chrome Catalogue

DRIVELINE

Gear Ratio Chart for Final Drive Pulleys Transmission Pulley

Stock 5-speed Big Twins come with 32-tooth pulleys. Smaller 29, 30, and 31-tooth pulleys provide stronger acceleration, while larger 33 and 34-tooth pulleys reduce engine speed for smoother cruising. For example, a 34-tooth pulley will reduce engine speed by about 240 RPM at 60 mph. Rear Wheel Pulley Smaller pulleys will reduce the engine speed for smoother cruising. Larger pulleys will raise the engine speed for stronger acceleration. 93 Softail models came with 61-tooth rear wheel pulleys. 94 Softail models came with 70-tooth rear wheel pulleys. 95-99 Softail models came with 65-tooth rear wheel pulleys, and Twin Cam 88 Softail models have 70-tooth pulleys. All other Big Twins equipped with rear belt drive units since 80, have 70-tooth rear pulleys. Primary Drive Ratios A primary ratio of 1.54 (24/37 tooth combination) was stock on all Big Twin models from 85-93. A primary ratio of 1.44 (25/36 tooth combination) is stock on all Big Twin models from 94-05.

Adjustable Mounting Plates High-quality American-made transmission mounting plate is CNC-machined for accuracy. The built-in dual adjusters operate from the end of the 1/2"-thick steel plate by counterbored sockethead screws. They permit accurate alignment of the mainshaft, ideal for open belt drives. Three holes at the front to fit various frames. Fits 4-speed Big Twin transmissions from 79-86 with flat bottom cases and 36-E78 if the sliders are milled off the bottom of the case. 17138 Black �����������������������������������������������������������������������$69.99 Note: Will not work with S.T.D. 4-speed cases.

Transmission Pulley

Rear Wheel Pulley

Secondary Ratio

Overall Ratio (1.54 Primary)

Overall Ratio (1.44 Primary)

29 30 31 32 33 34 29 30 31 32 33 34 29 30 31 32 33 34 29 30 31 32 33 34

70 70 70 70 70 70 68 68 68 68 68 68 65 65 65 65 65 65 61 61 61 61 61 61

2.41 2.33 2.26 2.19 2.12 2.06 2.35 2.27 2.19 2.13 2.06 2.00 2.24 2.17 2.10 2.03 1.97 1.91 2.10 2.03 1.97 1.91 1.85 1.79

3.72 3.60 3.48 3.37 3.27 3.17 3.61 3.49 3.38 3.27 3.17 3.08 3.45 3.34 3.23 3.13 3.03 2.94 3.24 3.13 3.03 2.94 2.85 2.76

3.48 3.36 3.25 3.15 3.06 3.00 3.38 3.26 3.16 3.06 2.97 2.88 3.23 3.12 3.02 2.92 2.84 2.75 3.02 2.92 2.83 2.75 2.66 2.58

4-Speed Type Billet

Transmission Mounting Plates Here’s a great new line of transmission mounting plates! The mounting plates for 4-speed transmissions are made of billet aluminum and available in stock or offset versions for wide tire applications. These plates are made from 3/16” steel plate and are machined, not stamped. Available in stock as well as offset versions for wide tire applications. You can’t find a better selection anywhere else Bro! Made in USA by Motorway. Tranny Plate for 4-Speed Big Twin frames 632015 Stock with no offset �������������������������������������������$75.99 632016 1/4” offset �������������������������������������������������������������$74.99 632017 1/2” offset �������������������������������������������������������������$79.99 632018 1” offset �����������������������������������������������������������������$79.99

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Transmission Mounting Plate Steel, chromed, transmission mounting plate for 4-speed Big Twin models 36-85. Drilled for both early and late frame tabs. Note: May interfere with transmission mounted oil filter bracket on late 82-85 models. 060000 Steel, chromed mounting plate �����������������������$32.99

*Prices shown are suggested retail prices only. Actual retail prices are determined by each dealer and may vary. All parts are sold each unless otherwise noted. Retail prices may reflect an each quantity.

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Please see Cautionary Information in back of catalog.