I gave up with my 42 slow and 108 main. I tried every combo... stock main with 42 slow.. and stock slow with 108 main... shimming the needle... adjusting the mixture.. I could not get the thing to rev without breaking up.. so I just threw the stocks back in and it revs perfectly in neutral now. Anyway if anyone wants the 108 main and 42 slow that I bought I would be happy to send them out to you for a little less than I paid.

Barnone and other confirmed these jets work for them.. I think I may have just gotten a poorly tuned biked to start with :(