i have a super tiger 61, the newer model.
and i had it on a cub for a while, ran great, i put it on a cap, let it sit for a while, all of a sudden its running like crap, i can get it tuned nice on the ground, but once its in the air, i keep the throttle at the same spot, the engine rpm gos up and down, the engine starts to studder and eventually conks, every time,
when im on the ground cranking the throttle, i dont see any airbubles at all enter the lines, it idles perfect, runs great on the ground, just not in the air.

any ideas?