I have a set of Honda 954 forks with RR4 lowers fitted to accomodate the radial calipers complete with MUPO K911 cartridges. I can split the cartridges or supply with the forks as a whole. They should fit RR1 - RR7 models maybe even later but would need to check. Come boxed with set up info and mounting instructions. These are an amazing bit of kit some of the best forks I have used and changing the spring rates is a 5 min job! Used for 4 races this season only. Can post UK only at buyers cost. £1000