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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. 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→. The bolt distances on 1965-1969 transmissions are identic, but the support plates will fit only after extensive milling. 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, with bearing, USA
W&W# Picture Price incl. VAT* Available from warehouse Germany?
80-200 Main Shaft Outer Bearing Supports fits Big Twin 1970→ with 4-speed transmissions and secondary chain, aluminum 44.10 € each
in stock
80-198 Main Shaft Outer Bearing Supports fits Big Twin 1970→ with 4-speed transmissions and secondary belt, with 4 socket head bolts 3/8”-16 x 2” (51 mm) 156.79 € each
in stock
* The price includes German VAT (19% or reduced rate of 7% for Books).

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