my benelli 250 have a 32 HP, air cooling engine, ( 231ccm, 2 stroke, 2cylinder 1976Year) good is i made some preparations for race, if you put vibrant exshaust, you get 10-30 % power. vith factory exshoust it goes about 160 km/h.
Bad is air cooling system, at sommer vith 40 C degree, at 8000 rpm the piston is blick the engine and piston rod is brake it off.
From mechanical side, gear box is similar too morbidelli. spare parts, I went too Italy every year in Imola.