I have a 99 VFR that I have worked on quite a bit. I am not sure exactly when this issue began because I have only been riding the bike every once in a while lately and not pushing it very hard. What is happening, as I get over 7k rpm the bike just starts losing power and the delivery gets very choppy. The wider I open the throttle at that point the worse it bogs. I can coax it as high as maybe 9500 rpm and that is all she will do. I thought perhaps I had a vaccum leak because the last major repair i did on the bike was a thermostat change which obviously required removing the throttle body. I completely redid all the vacuum hoses, and do believe I had a leak because previously a quick squirt of brake cleaner under the air box would cause it to bog a bit , now that is fixed and the bike runs fantastic below about 6k rpm and does not bog with a sprtiz of brake cleaner anymore. It still is having the higher rpm issue. Now, the tank is definitely a little rusty and is something i should have addressed some time ago. Does this maybe sound like a failing fuel pump/clogged fuel filter? It is so consistent that i was skeptical of that at first, but now I am not sure what else to look at. Adding to my post, this condition is only under load. I can rev the bike to redline in neutral with no issues.