Whenever I am at part throttle ( anything but pinned) it loads up with fuel and won't rev until I pin it and wait for it to clean out and hit power band.When it is in powerband it runs fine at any throttle but let the revs go down and hit it, it will load up again. Mod are as follows: milled head,fatty's,foam air filter,no snorkel,holes drilled in lid,+4 timing key and lightened flywheel. Bike ran fine with 250 jets a couple of weeks ago but had a slight hesitation that got worse. I have since rejetted numerous times 240,230 with no change. The only thing that seem to make a change was putting the needle clip at the top position. I am at the end of my rope! Any suggestions will help.