Created page with "thumb|350px|BMW R23 Developed from the single-cylinder BMW R20 of 1937/38, itself a development of BMW's best-selling R2, the R23 was produced bet..."
(Created page with "thumb|350px|BMW R23 Developed from the single-cylinder BMW R20 of 1937/38, itself a development of BMW's best-selling R2, the R23 was produced bet...")