Dimensions of Skorpion shock:
Distance between centres: 305mm
Top mount, width: 40mm, hole diameter: 12mm
Bottom mount, width inside 'U': 30mm, hole diameter: 12mm
The shock is the same size as those fitted to mid 90s Yamaha FZR 400/600/1000 models. I have an Ohlins shock from a FZR 400 which fits perfectly, but needs revalved (and possibly a new spring) as a Skorpion is a bit heavier than the FZR.
There's a list of aftermarket shocks for the Skorpion available on the UK market on my website, see:
http://www.mzskorpion.net/page35.htmYours,
Norman