This has been discussed ad nauseum in this forum.. the search button is your friend
To check the oil level in your XT/TT you need to ride AT LEAST 15km or 10 miles.. get it nice and hot
Shut it off and keep the bike upright on a level surface
Check your dipstick
2.7 liters sound about right- 3+ liters sounds a bit much
Never ever check the oil in the morning on a cold bike, check it after a ride
Do it this way and the XT gods will send you good karma
Laromo \ '02 KTM 300 EXC "Jake"
'05 KTM 640 ADV "Fatman"