hey guys,I'm a greenhorn to the site,just had a question about main jet size? I have 2- 2001 blasters and they both have stock bore,stock carbie,fmf fatty pipe and silencer,im in texas(not sure about elev.)k&n filters and no lid.was wandering what size main jet to use?? i think it has a 270 right now.Also what causes them to leak fuel from carb?(bad seat in bowl? carb kit?)i have to turn the petcock valve off between rides or it will have a big puddle of fuel under blaster..Thanks.