Right on. From what I can tell, my P5 is specifically the P5XLT and not the P5XLT/16 or the P5XL. The engraving on the bottom reads 0587/14. Is the 14 indicative of manufactured in 2014? The new Bonito reads 0885/19.

Browsing the Out-of-production engines page on Novarossi's website, and comparing the 3 different P5's there is what leads me to believe mine's the P5XLT since the crank case is black, the crankshaft doesn't have a silicone ramp, the carb is the normal reverse style and it has no midrange adjustment screw. If that's correct, then the exploded view sheet shows it's a 24063, which I'm hoping is the better carb you mentioned rather than the 24069 that the new Bonito's exploded view sheet shows it has.