SuperMax Products - Sportster Final Drives


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Phone: 800-604-8030

3. Sportster Final Drives

3.1 SPORTSTER - TRANSMISSION PULLEYS

SuperMax manufacturers Transmission Pulleys for "Sportsters" that fit from 1952 to present. The splines for the early and late 4 and 5 speeds and are available in the three different pulley tooth counts. We have 27, 28 and 29 Tooth Pulleys. If you desire to change the gear ratio on a factory drive or if you wish to convert your chain drive "Sportster" to belt drive conversion. The maintenance on a belt drive is less than 1/10th that of a chain drive. No oil or lubrication is required and the vibration factor is much lower than the chain drive counterpart. In an overall situation the belt drive will save you money and a lot of maintenance and oily grunge all over you, your bike, your gear, and last but not least, your passenger.

If you own a factory installed drive chances are you don't like the gear ratio that they have selected for you. We can help you in a variety of ways. Our Transmission Pulleys will weigh much less than the cast iron pulleys offered with the factory installed drives and the variety of ratios should help some. The rear wheel pulleys that we make are also of a Poly Construction and wear for a long time. When considering gear ratio changes SuperMax has a large selection, so the motorcycle will perform to your satisfaction. If you have a 4 speed and keep reaching for 5^th gear, your bike probably geared too low. If you ride a 5 speed and are looking for 6^th gear, your bike probably geared too low. The 4 speed and the 5 speed are 1 to 1 in top gear.

Sportster splined shaft application fitments are displayed below:

1952-1983 1984-1990 1991 to present
4 speed, 6 splines 4 speed, 19 splines 5 speed, 33 splines

All 3 types of splined transmission pulleys are available in 27, 28 or 29 tooth,
weighing from 1 1/2 to 2 1/2 pounds depending on pulley size.

4 SPEEDS 6 Spline

Part Number	Description
TP 27 4 Sportster 6 Spline	27 Tooth 14mm Transmission Pulley, 1 1/2". Also available in 1 1/8" (Extra charge).
TP 28 4 Sportster 6 Spline	28 Tooth 14mm Transmission Pulley, 1 1/2". Also available in 1 1/8" (Extra charge).
TP 29 4 Sportster 6 Spline	29 Tooth 14mm Transmission Pulley, 1 1/2". Also available in 1 1/8" (Extra charge).

The above Pulleys fit from 1952 to 1984 6 Splines, some 84 models have 19 Splines. All Pulleys for 1983 to present will be the same as above except change the number of Splines to 19 instead of 6.

4 SPEEDS 19 Spline

Part Number	Description
TP 27 4 Sportster 19 Spline	27 Tooth 14mm Transmission Pulley, 1 1/2". Also available in 1 1/8" (Extra charge).
TP 28 4 Sportster 19 Spline	28 Tooth 14mm Transmission Pulley, 1 1/2". Also available in 1 1/8" (Extra charge).
TP 29 4 Sportster 19 Spline	29 Tooth 14mm Transmission Pulley, 1 1/2". Also available in 1 1/8" (Extra charge).

5 SPEEDS 33 Spline

Part Number	Description
TP 27 5 Sportster 33 Spline	27 Tooth 14mm Transmission Pulley, 1 1/2". Also available in 1 1/8" (Extra charge).
TP 28 5 Sportster 33 Spline	28 Tooth 14mm Transmission Pulley, 1 1/2". Also available in 1 1/8" (Extra charge).
TP 29 5 Sportster 33 Spline	29 Tooth 14mm Transmission Pulley, 1 1/2". Also available in 1 1/8" (Extra charge).

The pulleys above can be installed on the late 1997 and up 5 speeds with the .750" thick splines if the early spacer kit and seal are used. Seal part No. 12050 and part No. 33334-84. Keep in mind the SuperMax splines are a 55 on the D scale for hardness. These do not give up as the factory cast iron splines that were offered on the motorcycle as new. As in many cases aftermarket is far superior, this time for sure! A "Seal and Spacer" kit for above is also available from SuperMax BELT DRIVES.

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Phone: 800-604-8030

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