It’s almost impossible to find an Ohlins fork for 929/954. But there are a lot of offers for RC51.
So the question is... Can I install RC51 Ohlins fork on 929/954? What should I do to make it right? Must I use another triple trees and RC51 front wheel axle?

 

http://www.hardracing.com/Shocks%20&...PricingMID.htm

Ohlins for a 954.

I do believe that most Honda bikes share the same trpples. the only difference being the size of the forks attached to them. In order to install the rc51 forks, you may need the '51 triples.