phil yates said:
It amazes me the shop chap couldn't tell me anything about them.
The Fullauto head is bare so you need to add in valves (Kibblewhite) new collets and perhaps the spring kit with titanium retainers.
If your existing rockers,spindles and covers are good they could be swapped over.
If not you are looking at well over $3000 plus labour.
If I walked into a retailers who was selling that head (Fullauto) and they had no idea what a RH4 or RH10 head was I would shop elsewhere.
You might give some leeway with the RH1 since that head is not stamped.
A mine field for newbies and the dreaded 'born again British biker. :wink: