Guys need some help,im stuck!Need to know what size drill bits to use to drill the jets and the dump tubes on a keihin 38mm PJ. Some people say .120 on the mains.Do i need to drill or just buy a larger set of jets. I know this is permanent on a keihin, thats why im doing this on a spare carb. Any help or tips would be greatly appreciated thanks! oh this is on a 89 trx250r if that makes any diff. thanks again everyone!!!!!!!!