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Belt drive by Rivera Primo; for open applications; fits 4-speed Big Twin 1955-1984; width: 2”; kickstart only; sprocket shaft type: splined; pitch: 8 mm; number of teeth: 47 x 76; USA; gross weight: 4.6 kg

Primo belt drives are developed and manufactured by Harley riders for Harley riders. Before the first Primo belt drive was sold, the belt drive systems had been tested on a Top Fuel drag bike until they would stand up to the strain. Each kit consists of the complete belt drive unit, a sprocket shaft nut, all necessary hardware and detailed installation instructions.

These are 2” versions for more of engine power. The clutch shell will not fit into standard primary cases.

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Due to various circumstances (improper selection, installation and maintenance) and applications under which belt drives are used, W&W Cycles is not liable for damaged belts.
Dry clutches generate noises when the clutch is disengaged. The noise level depends on condition and construction of the clutch plates. If the primary drive is run open (i.e. without primary housing), these noises can be heard.
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Spare parts:

  • 80-131

    80-131 Primary belt by Rivera Primo; for 4-speed Big Twin 1936-1984, open primary only, with 47/76T pulley combination; fiber glass/rubber compound; width: 2”; pitch: ...

See also:

  • Transmission Adjuster Custom

    Transmission Adjuster Custom Dual adjuster for 4-speed transmissions 1936-64 (tin primary) and 4-speed transmissions thru 1984 with open primary drives.

Have any questions?

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    Phone: +49 / 931 250 61 16