Well, the SS9 is boasting 107 Horsies. The ribelleis pushing 147 to 171 horsies. So there is quite a bit difference there. Morgan is correct, I was thinking of the Experia Motor, got it confused with the SS9, given it's smaller output, thought they shared the same smaller motor.
Most of the software, it's matched up between modules and such, and serialized too Id imagine, so slapping this or that software on may not work. You'd have to change it's 'version' in the other parts that are expecting to see #.... at the BMS, or VCU as an example. Them seeing a different number, it may not like it, although this is an excellent form of theft protection. Someone jacks your bike, they can't aftermarket the major parts, it won't talk with anyone elses stuff, and MUST go thru a valid service center, and the stolen ID would be seen then.
That would be a nice thing they could offer people though. For say a grand or so, upgrade the Ribelle to EGO stats, or SS9 to Ribelle stats. TBH tho I don't think id want to be riding a bike at 150 MPH with two big ole bags hanging off it. That's probably tear them up Id imagine too.
Aaron