Hydro lock? Need some ideas

[DanL]

Replaced fuel lines with OEM lines, replaced vacuum lines with OEM lines and the bike works great at slow speed for 20+ miles but when it got up to 50+ it started sputtering  like it was starved for gas and it dies.  Opened the gas cap and the bike started up for 10+ miles and the same thing happens. Opened the gas cap and it started again.  I'm thinking there is a vacuum leak but not sure where.  What am I missing?  Any ideas?
Thanks in advance

[old2soon]

Check for pinched vent line. RIDE SAFE.

[cma1]

at the rear of your fuel tank is a small vent hose, it runs behind the center cover down to the ground with the rest of the vent and overflow lines. if you have had your tank off lately you probably pinched it off and that's your problem. kind of like the plug in the boat, every one does it once. and by the way, what your experiencing ain't hydrolock

[Gryphon Rider]

Check for pinched vent line. RIDE SAFE.

Specifically, the small hose that connects to the bottom of your gas tank, nearest the seat.  If that is pinched, the tank won't take in air as fuel is used, thus fuel won't flow out of the tank.

[DanL]

Thanks guys! Knowing which hose to focus on really helps.  I love this bike and after 13 years this is the first time she has frustrated me. Having only 90k on her makes her still a youngster. 

[salty1]

Far from hydrolocked if she runs.    So Let us know what you find.?