Just wanted to share: yesterday I switched out the stock jets 48/155 to a 50 and 158, grinding the tab, 2 1/2 turns out. K&N filter, stock exhaust. Holy cow, what a difference. Best $20.50 I've spent.
Bike was popping on decel, and a touch stumbly down low. Now- less choke to start, smoother/torquier off the bottom and midrange, happy owner.