Ah, that makes sense! Do you still have the pegs off your 640 or are they now on the 690? Your bike's an 05 or 06 right, so the CJ Designs extensions should fit. Fancy selling em if you still have em?
I originally had pivot pegs without the extensions on the 640 which I put on the 690 Lee, so no longer have them.
Mine's an 06 so the same as your's.
The extensions take a little getting used to, by that I mean you may miss the back brake in a moment of terror at first
Standard pegs are fine, exactly the same as I have on the Husaberg ..... save the money for a good tent