Originally Posted by PatrickM
With many threads on the subject, and am not quite sure where to post this - so thought I'd use this one :)
The 2013 F800GS uses a 43mm WP fork. Talking to the KTM guys and it looks like some of the older KTM's used a 43mm fork as well.
Would the WP 4357 (43mm) work and/or be a drop in? It apparently was used in a variety of bikes and had the compression and rebound settings (top and bottom) that the Shiver replacement for the 2008-2012 are taking advantage of.
The 43's are not a drop in, nor are the 48's. The BMW WP fork lugs do not share the same inner cartridge step as the 45mm zokes. The inner bore needs to be machined to accept the updated cartridge. Also, the fork caps are not a direct fit, either the 43mm or 48mm.
I have done it, and offer the 2013 fork conversion but it is a lot more labor intensive than the 45mm conversion.