The first post in the thread mentions that the forks are Ohlins Superbike Forks, but not much else. I think I explained their history somewhere else in the thread, but I'll repeat it just in case. The forks are the ones Kenny Dreer used in his prototype bikes, the basis for the current 961 Commandos. I bought them from Kenny when he was selling off surplus parts after the design was sold to Stu Garner and the new Norton company in the UK. Kenny told me that he encountered them on a modern Japanese custom superbike, and decided he wanted to use them on his modern Norton update. When he asked Ohlins, they said they were custom made for their Japanese customer, and weren't available as a stock item. After Kenny got permission to use them from the customer, Ohlins was willing to supply them. I'm not sure how accurate my memory of that story is, but it's entertaining. In any case, Ohlins did eventually sell them as type FG 43 RWU. There were at least two versions made. The FG 433 was an off the shelf universal use set, while the FG 333 was the OEM fork specified by Norton for their 961 Commandos with RWU (right way up) forks. As far as I can tell, the only differences are that the in the overall length, plus any internal valving differences. Neither of them are supported any more by Ohlins. Their current version is the type FG620, which Ohlins refers to as their Retro 43 RWU fork. They are the latest cartridge design, with rebound damping in one fork and compression in the other. The ones I have on this bike are the FG 433.
Ken