ok heres some of the problems i''ve had for it bogging, it was actually doing it this afternoon which i don't know why and backfiring but ok heres a decent troubleshooting list.
For bogging #1 problem is caused by too much or too little air.
I have the exact same setup but 1mm carb size smaller and im running a 64 jet, you should be running the same TRUST ME, i have an extra if you would like to buy it from me.
Next thing.... once i got my connections on the right side of the handle bar wet by accident, it would idle but when tryign to give it gas it wasn't getting enough electricity flowing to my plug causing it to short out and leaving unburned fuel.
Timing can be a pain but im pretty sure its not ur timing if u ran b4 w/ only bogging a few times. Are u still running a stock air filter (the ugly box).. if so i recommend derestricting it by taking out the plastic peice inside of it and filing down, or drilling out the restrictive piece inside the intake tube of the airbox. Also check the foam inside to see if its dirty if so could be restricting airflow also.
Hopefully you've tried w/ no airbox on to see if it does it... does it do it when its on your centerstand or only with weight on it?
If none of this works then its probably your timing i'd guess but i highly doubt it.