In the exhaust chest from the bottom cilinder, you have on top a longer quidance then the above cilinders.
Anyone that know\tested the effects if you grind it away? The omc 's did not have those i thought.
Portwork is done, nothing special. Transfers set @ 120 , exhaust higher & wider, cut heads @ 1.8:2 ratio.
Expecting around 180/190 psi, 90hp carbs, cnc machined flywheel...
Will test the mods this year/summer, maybe next winter i will try some more.