If RR is faulty, Shindengen is recommended. Done by several here and can be found cheaply from Jap bikes second hand.

Great find and looking good!

Hate to be a bore, but I`d mail Marvic to hear if they are still safe to use.
After all, they're 30 years old mag wheels...

"Or is it maybe 40 mm header pipe from some other Ducati bike (SS or Monster)?"

My guess too.
600-750 had smaller I/d.

Two bolts from front tank rest? Don't remember what they look like.

Pulled straight away.

Look in the manuals in Tech FAQ.

Setting nonlinear TPS

https://www.youtube.com/watch?v=Ku6pS9yTvjY

http://www.bikeboy.org/ducati2vthrottleb.html

Very nice find and well done!
Worth north of 5k US§ I guess.

PM sits in outbox til reciever reads them.

Do a search of Shindengen reg/rec, makes modern MosFet replacements.

Looks like a modern Ducati one, not original.
Loosen it and see what it says, like Shindengen, letters, numbers.

.would inserting the chip the wrong damage the E Prom? would inserting the chip the wrong way round damage the ECU? Yes. No. http://www.bikeboy.org/products.html#p7 .Put it in the wrong way and it will either not work properly (runs the pump continuously) or blow the eprom up. What happens when you...

Injectors you just remove and have them sonically cleaned by professionals.

How is battery condition?
If it’s really low on juice, it can cause rough running as you described, FHE.

"she was running rough."
Could explain that further? Did it misfire, pop from exhaust, not fully rev etc?

Any kinks in fuel lines? Fuel lines fresh/ok?
How many miles since last check of valves, belts and TPS?