yes, definetely go with a noss head. pm "dlnoss" here and he can get you set up. i dont personally have one of his heads becasue mine came with a different kind, but if i were to buy one it would be a noss head. and if you want really good customer service, i have never heard or seen any complaints about dlnoss. as for carbs, if you are basically runnin a stock engine, stock carbs are fine. i think it has been posted before that the stock carbs actually outflow a stock engine. so with your mods id say its prolly runnin pretty good. if you do decide to go bigger, i wouldnt go much more than 28mm.