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for Big Twin 1955-1984

Early model belt drives featuring the ultra severe-duty 11mm Aramid Polychain belt. These belt drives are designed for enclosed primary fitment, either within aluminum primaries or within tin (stamped steel) covers. For the later aluminum primary models (1965-1984) two kits are offered for kickstart and electric start models. The earlier tin primary models are available for tapered (1937-1954) or splined shaft (1955-1964) applications, kickstart only.

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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.
Belt drive »Brute II Extreme« by Rivera Primo; width: 1-1/2”; sprocket shaft type: splined; pitch: 11 mm; USA
W&W# Picture net price* Available from warehouse Germany?
80-017 for Big Twin 1955-1984 fits Big Twin 1955-1964; kickstart only; number of teeth: 33 x 49 $744.30 kit
in stock
80-019 for Big Twin 1955-1984 fits Big Twin 1965-1984 (4-speed); kick & electric start; number of teeth: 34 x 49 $855.42 kit
in stock
* United States of America: Tax free shipping. Please check your local import fees.

Spare parts:

  • 80-223

    80-223 Washer by Rivera Primo; for Motor pulley; fits Big Twin 1955→; zinc plated; sprocket shaft type: splined; USA; gross weight: 60 g

  • 80-221

    80-221 Nut by Rivera Primo; for Motor pulley; fits Big Twin 1955→; zinc plated, 7/8 - 14; sprocket shaft type: splined; USA; gross weight: 90 g

  • 80-095

    80-095 Primary belt »Brute II« by Rivera Primo; for 4-speed Big Twin 1936-1984 with 33/49T or 34/49T pulley combination; use with idler assy; aramid/rubber compound; ...

Accessories:

  • Front Pulley Spacers

    Front Pulley Spacers The main reason for premature belt failure is the misalignment of front and rear pullies. These spacers are designed to be used behind the engine pulley to ...

See also:

  • Chopper Dave’s Alternator Covers

    Chopper Dave’s Alternator Covers A design by Randy Smith, founder of Custom Cycle Engineering, who created it back in the 1970s. He allowed Chopper Dave to use his product as a pattern for ...

  • 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?

  • Our sales team will be glad to help out:
    Mondays - Thursdays 08:00-17:00 CET, Fridays 08:00-16:00 CET
    Phone: +49 / 931 250 61 16
    eMail: sales@wwag.com