These transmission belt pulleys allow you to change your final drive ratio for faster acceleration or lower RPM cruising on the highway. Installation notes – Changing the final drive ratio will affect speedometer reading; ECM adjustment or a Speedometer Calibration Module may be required to correct reading. Generally speaking, a 1-tooth change can be performed without a belt length change; more than 1 tooth may require changing belt length. Rear axle position adjustment required for each pulley tooth change is +/-.125″ (3.2mm), while rear axle position adjustment required for each belt tooth change is +/-.280″ (7.1mm). Check axle travel and availability of belts before ordering!

Pulleys for ’85-’06 5-Speed Big Twins – Stock pulley size is 32T. Andrews makes 5 different pulley sizes to allow you to change your overall gearing. 3 smaller sizes (29, 30 & 31) for quicker acceleration or to better handle heavy loads (sidecars, trailers, etc.), or 2 larger sizes (33 & 34) for reduced rpm on the highway. Ratios listed below are using ‘94-up primary ratio (25/36) and a 70 tooth rear pulley, standard on most models except ‘93 FXST’s (61T), and ‘94-’99 FXST’s (65T). Pulleys fit all ‘85-’06 models; include spacer, seal, lockplate & screws.

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