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
Gearbox cam plate comparison
Comparison of the different gearbox cam plates used in the R24 – R27 and R50 – R69S models. For more information about the R50 – R69S shifting system, click following links: Smooth shifting R50 – R69S R50 – R69S Old and New style shifter mechanism
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.
Flywheel R69
The R69 flywheel differs from the other / 2 flywheels because of the position of the ignition marks:
R51/3 & R67 engine numbers
In the course of 1951, BMW changed the format of the engine number and the BMW letters cast in the engine case. The upper one is the old format. Note the dots between the BMW letters. The early engine cases had the VIN number stamped in an oval window. Later on the VIN number moved to the area just above the pushrod tubes Photos: Manolis Saravelakis, Greece
Motorcycle models
Overview of BMW motorcycle models produced from 1948 to 1969 (specials not included) Click for larger image: Models & Production Numbers