I need some advice. I can't make new thread so write here.
I swap my engine on Monster S2R800 2005 in Monster 1100 EVO 2012 engine. And make custom exhaust. And i think to change injectors on 280.4.023.1A from 1100 evo.
What do you think about ecu? What ecu will be better for me? I don't want change electric wiring if it posible.
There's a thread on the other ducati monster forum by Heman - he put an 1100 EVO engine in an S2R 1000.
I put an 1100S engine in my S2R 800.
Both the 1100s and 1100 EVO use a Siemens ECU, not a Marelli like you have in yours.
So you need to change the timing gear like I outlined earlier in this thread. You don't need to change the wiring or injectors. Only thing is that I couldn't get the oil pressure gauge to work, but I'll live with that.
You should get a valve cover off an S2R 1k that can hold the thermister on the front cylinder, which tells the ECU the engine temp for mapping purposes.
Then I suggest sending the ECU to Rexxer for a reflash. They did a nearly perfect job on mine on the first try. I had it dyno'ed and PCV which resulting in some smoothing. I suggest paying the extra $100 to disable the immobilizer too, as that can be a pain. I tried the GuzziDiag route and bricked an ECU, and didn't even get close to getting it running well.
You need new intake manifolds and I suggest getting an evo, 1100, or s2r1k throttle bodies for the extra diameter, but it's not necessary - they are cheap and you'll be in there anyway. Don't use the stepper motor - pull that and put some vacuum caps on it.
I used a full arrow exhaust made for an s2r 1k - it bolted up perfectly and I like the look a LOT better than the 100 spaghetti pipes, but that's just me.
Get started and post back - I'll give you whatever help I can. It's very doable, just need to be willing to take the time and work out the issues as they arise.
The improvement in torque is amazing - and the extra HP from 6k - 9k is thrilling.