I may be off here but you might have a bad roll over valve.
Heres a link to a Bike Bandit diagram... Look for #20

I figure if its bad and closing up on you it maye be causing a vapor lock situation. Try bypassing it for a couple days...just dont drop your bike.

SOLD: 07 Black BA, 39mm FCRs, TPUSA stage 1 head, TPUSA 813 cams, TPUSA 10.8:1 pistons, TTP #3 igniter, Specialty Spares Long Cannons, Tsukayu Hard Bags. 82HP/55tq NEW: 19 Goldwing Tour DCT