BMW R68 useful elements
| Frame number / Engine number | Changes in construction |
| 650001 | Beginning of production. First built motorcycle. |
| 650303 | Balance beam changed over from sockets to bearing needles. Telescopic
front fork with rubber seals instead of sheet metal case. Rear shock
strut case above any longer does not paint crankshaft now with wedge
carburetor and cylinder head now with centering can changed barrel
bearing for the crankshaft. |
| 650632 | Crankshaft with changed wedge |
| 650924 | Frame with sidecar mounts* on the right side |
| 651304 | Breaks
changed to full hub. Changed lamp box (sweet heart light), taillight
with stop light frame number (4mm height), the left rear shock strut,
frame number (5mm height) near the lever and torpedo exhausts
(approximately in July 1953). |
| 651452 | Last built motorcycle. |
* Frame with sidecar mounts begins from number 650924,
see "BMW R68 Parts Catalogue ed. June 1953" and
"Slabon Ronald, "How to Restore Your BMW Motorcycle: Twins 1950-1969", Motorbooks International, 1994, page 54".
