just got a reply to my questions. The parts such as cams, and heads are different designs from the 1125, 1190RS and the 1190RX.
Hi John,
While the 1125, 1190RS, and 1190RX may have the same base part numbers (starting with V0001 or V0002) they are quite a bit different in their design, as indicated by the second portion of the part number (.1AMA, .1B6, .1B7).
These differences include chamber volume and design, intake and exhaust port design, machining, valve seat material, valve guide material, etc.
The castings for the RX are different as well, specifically in comparison to the 1125 and RS. The RX uses a new design casting. They are all, indeed, different parts. Bottom line = all three engines show different part numbers because they all use different parts. The RS and RX use different cam profile designs.
So I asked about availability of RX engine parts and can I order direct or do I have to go through one of their dealers.
Stay tuned.