I have a 08 KTM 250SXF, 1/4-a little less than 1/2 throttle it bogs and cuts out. Idle is perfect, past 1/2-WOT is mint (tan plug when I chopped it last). when cold there is a slight decel pop, but when its up to temp that all goes away.
Since your god to motocycle tuning, care to diagnose my problem above on my race bike? I mean, I gave those very same symptoms to an old school flat track racer, who works out of his garage. He told me exactly what to change and it ran 100% perfect after I did.