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Main Shaft Outer Bearing Supports

The transmission support is mandatory for all 1965–up 4-speed transmissions in combination with open belt drives or tin primaries, because the mainshaft of these transmissions has an additional support in the aluminum primary housing. If the housing has been removed, a supplementary transmission support is required.

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The bearing supports are designed for Big Twin 4 speed transmissions 1970-1984. The bolt distances on 1965-1969 transmissions are identic, but the support plates will fit only after extensive milling. Due to the shorter mainshaft a 1965-1969 clutch is placed 1/2” closer to the transmission case than the 1970→ versions.
Bearing support plate by Rivera Primo; for Main shaft / Transmission; fits Big Twin with 4-speed transmissions 1965-1984; with bearing; USA
W&W# Picture net price* Available from warehouse Germany?
80-200 Main Shaft Outer Bearing Supports with secondary chain; aluminum $44.09 each
in stock
80-198 Main Shaft Outer Bearing Supports with secondary belt; with 4 socket head bolts 3/8”-16 x 2” (51 mm) $163.13 each
momentarily not in stock
* United States of America: Tax free shipping. Please check your local import fees.

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