Originally posted by Corse-R
Don't be afraid, not all the Sirios suffer from the leaky carb (mine unit was one of the very early ones). The black head denotes (at least here) ABC construction, the .12 AAC ones come with a blue head.
Saw some Sirios with 3 needle carbs that don't leak and others leak, seems quite a Loto (some 2 needle carbs still leak, it's a flaw that predates it). Is a real fine engine. if you encounter this problem, quickest, safest and best way to solve it is putting a Nova carb in the place of the plastic unit.
Thanks hopefully mine wont leak because with what trinity is charging for Novarossi engines I can only Imagine what a carb wwill cost.