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A “strenght & weakness” overview of the different seal materials available in the market.

Click image for table    

A comprehensive list of bolts, nuts and washers for the R50 – R69S models Click image for list :                          

The width of rims can be measured in 2 different ways: the inside or the outside. This means that one and the same rim can be indicated both in (for example) 2.15 “and 3.08″ WM2: inside 1.85″ (47 mm) outside 2.72″ (69 mm) WM3: inside 2.15″ (55 mm) outside 3.08” (78.2 mm)      

Overview of the different valve types and related components, used in the BMW 1 and 2-cylinder motorcycles 1948 – 1969

Overview of ISO metric screw threads M3 – M30. Commonly used screw threads on 1948 – 1969 BMW models are M6x1 coarse, M8x1.25 coarse and M8x1.0 fine.   The length of bolts and screws is measured like this:                

Overview of carburetor nr’s and settings