tighten the adjuster screw in snug then out four turns. the bottom screw that you can get to threw the access hole, that should get you close. you have to have a good tune for it to shift right also, if its too rich it wont be able to get the rpm up high enough. other than that you will have to take the case apart to re adjust first to second, I cant remember off hand where mines set at.
I kinda think its your tune though.

good luck with it.