I'm doing exactly that at the moment. You need 51mm clip ons and rather than buying the rizoma relocation kit, I'll be chopping the riser...as below.
One thing I also did was re-route the clutch cable so there wasn't such an extreme angle.
Lenker + Umbau Scrambler Stummellenker mit Tüv
51mm CNC Split Clip On Handlebars for Aprilia RSV Mille R 00-04 ZX6R ZX636 ZX600
One thing I also did was re-route the clutch cable so there wasn't such an extreme angle.
Lenker + Umbau Scrambler Stummellenker mit Tüv
51mm CNC Split Clip On Handlebars for Aprilia RSV Mille R 00-04 ZX6R ZX636 ZX600