R51/3 – R69S engine gear set dimensions
Based on a sample of 74 gear sets, this graph shows the frequency of the different gear sets and the spread around the target dimension of +0.
List of bearings in the 1 & 2 cylinder engine, gearbox and final drive
Click thumbnail to open the list. R24 – R27 R51/3 – R68 R50 – R69S
2 cylinder crankshaft identification
Flow chart to identify a 2 cylinder crankshaft. Click on the flow chart and table for larger images, click <- arrow in your browser to return to this page.
Parts list – conversion from 6V to 12V for R51/3 – R68, R50 – R69S
This list shows the part numbers for all parts that need to be changed in case of a conversion to 12V
Breather plates on the R51/3 – R69S engines
3 different breather plates have been used on the boxer engines:
Wheel offset
Wheel offset for R51/2 – R68, R50 – R69S models (from “1000 Tricks für Schnelle BMW’s”)
Motorcycle models
Overview of BMW motorcycle models produced from 1948 to 1969 (specials not included) Click for larger image: Models & Production Numbers
Valves types and related components
Overview of the different valve types and related components, used in the BMW 1 and 2-cylinder motorcycles 1948 – 1969