i keep on reading about head milling on puchs... How much difference does it really make if you sand the head down to the fin's? It can't be more then a mm or 2. I keep on seeing the name steve on posts about head milling so i'm assuming you are the expert on this one. Will i really see a noticable gain in low end by sanding down my cylinder head.
(stock 50cc e50, i'm making winter performace plans. port matching, upgrade exhaust, possible head milling since i have to take it off to get to the cylinder anyway.)