KTM 690 series
The KTM 690 series is a range of single cylinder 4-stroke motorcycles made by KTM. The 690's roots are in the 1994 KTM 620 Duke and the 1997 KTM 620 Adventure, both motors were actually 609cc. 1998 saw both changing their model designation to 640 and introduced the 640 Supermoto with a 625cc motor shared between them. In 2008 the KTM 640 Adventure R was replaced by the KTM 690 Enduro. Also in 2008, the Duke, SMC and Enduro R models were designated 690 even though the actual displacement of the LC4 motor was 654cc. In the 2011–2012 timeframe all 690s were increased to 690cc.