Hey all! I have one of those gofit $50 "big bore" top end kits that are sold on Ebay and Amazon, the kit came with everything needed to do the top end, and it came with a dell'orto sha style carb. Although this isn't any bigger than the stock piston on my mototec demon 50, but it is windowed, so I'm hoping it helps out a little bit. My question is, I've installed a high performance pumper style carb on the bike with a velocity stack, it starts and runs great and makes more power than the stock set up...do I really need to swap it out with the dell'orto sha knockoff when I rebuild the top end? I took the advice of a poster here with the carb, and since it works so well, I'd like to keep it on. Thanks for your input!