i have a NSR im re-building at the moment, and was planning on using the HRC MC-21 barrels on top of a stock MC-16 bottom end just gto get started.
I was going to do this while i do a complete re-build of the MC-21 which has all the HRC computer and other parts etc attached to it along with JHA pipes etc etc. Should i just focus on building the HRC MC-21 from the start as a complete re-build instead of wasting time on the MC-16 bottom end etc?

One of the guys on here is currently pricing a full bottom end bearing kit for me so once thats oganised there no reason why we can't go for the HRC MC-21.

Apparently the bike was previously raced by a sponsored kiwi rider in Greece and at the end of his season he managed to convince the Team to let him keep the engine and he brought it home in his suitcase.