Rossi Engine?
 

Who knows what is the ralationship between Rossi and NovaRossi?
And how about the Rossi engine?

Thanks

theyare two brothers each owns his own company
i personaly like the rossi black magic it has a ton of low end
and it pinches nich but make sure you gasket seal the entire engine because every screw will come out of it

http://www.axemotor.it/italiano/motoricar.htm

in the page linked by the above address,
What is the meaning of "FI" Piston?

i would quess forged something
the material the piston is made off