Re: Why are these different?? Home › Forum › Ask A Member › Why are these different?? › Re: Why are these different?? kerryUS Member - 1 Year (includes $3 online payment fee)Replies: 432Topics: 18 March 25, 2018 at 9:12 pm #73033 There is a kit to change the fixed HS jet with an adjustable, P/N 278623. Finding a kit could be a challenge… Attachments: If you have too many, AND not enough, you're a collector.