No electrics at all.
Ciao

does that mean it isn`t mentioned or he didn`t do it ? If ignition timing isn`t changed the motor will not live very long as sooner or later there will be a piston damage. You need to modify the flywheel or get a programmable ignition module (standard ignition timing is 34° full advance and usually needs to be changed to 26, 28° or 30° with dual spark plugs depending on compression ratio and if it`s a bike originally equipped with a Kokusan or Digipley ignition)

He says there was any modification except for the exhaust pipes and for the setting of the carburettors by a Dynojet st2 kit.
No mention about the ignition.
Ciao

I'm thinking this might be a good beginning for an overboosted engine

Actually I've seen an 851 engine with turbo supercharger and marelli ecu from a fiat uno turbo 1300cc, but I was meaning a volumetric supercharger such as EATON ones
(here's the site of an italian tuner)

Wonder how mutch torque can a 904 engine bear!

Why do butcher those ancient bikes????
I'm already trying to convince my 906 friend to not fit an ST4 engine on his bike....
Ciao

Some magazine (both modern and ancient) sometimes tells crap...
Ciao

The US site talks about retarding the timing but the spec is unreadable

Maybe electrex has a special mapping for desmodue?
Otherwise "pederzini" black boxes step 6 or 7 can do

The friend of mine can't do the work by himself, so I guess such work can be very, very expensive...
Besides, many problems could be got over fitting an 851/888 engine, that would fit very well into the Paso frame.
But, all in all, I don't know how much is worth such project...
The Paso's frame doesn't tolerate the 4 valves power and has to be strengthened.
Ciao