a 34mm carb is way overkill for a unported blaster with a stock pipe. once you get it ported and get a pipe a larger carb might be a good upgrade. but it depends on the pipe you buy if u were to get a fmf or dmc a stock carb would be best to suit the low/mid characteristics.if you got a toomey or a right bend those are mid/top end pipes a larger carb would be beneficial