| The 1098 race ecu is NOT coded to any particular bike. It can be swapped over as much as you like.
As for the 70mm exhaust from a 1098, it will fit the 848 but I am pretty sure that I read somewhere that the narrower 57mm system works better on the 848, could just be sales **** though to sell more systems !
The ecu's will naturally be mapped differently. | 
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