Bogging after a few laps

So I have a triple tappered needle in position 3 and also an adjustable main jet. I do a couple of laps on the track, everything is fine, the bike runs great and all, very peppy with the new mods. But after a while, when I'm rolling at slow speeds, I punch it, WOT, the bike will go but then it will bog but I keep it at WOT then it will slowly go again.

So I tried it again, go slow, then instead of just punching it, I go give gas slowly up to WOT and everything is perfect, no bogging if I rev slowly.

So guys, any idea? Maybe because the engine is hot?!
Please help

Check your plug...it should tell you whether you are too rich or too lean.
Check it before you ride it again and also do a WOT run for 20-30 seconds shut it off immediately and recheck it.
Have you tried the 4th position?

Nope not yet, I tried 5 position, way too rich and it bogs so I kept it in position 3. I'll check the bike out tomorrow at work, I just came back from a little pb race tonight.

yeah, try moving it to the 4th possition and it might work for you!