Thanks for this; that's what the Corbin instructions mention. However, with mine, the seat pan is actually making contact with the hardware bracket for the front seat so even with a longer latch it still doesn't sit on there correctly.
I received my Corbin seat two weeks ago and fit it on the bike today. Looks great but I can't get it to latch, I've tried everything I can think of so waiting to hear what Corbin says tomorrow.
I agree with this theory if the tires show signs of being misshapen flat or out of round profile its time to replace them. That will most likely happen before the tread wears out.
Like 2and3cylinnders said maybe its the fuel filter. I'd suggest changing the spark plugs as a quick way to eliminate an issue with them. Good luck with it.