Alright, I have a 2005 Yamaha Blaster. Ive had it for over 2 years now and have had no problems at all. The other day it was sticking in 5th and 6th gear. I managed to get them out and when i did i went home and put some 10w-30 oil in the crank case. The day after i went riding with my buds for a few hours and it didn't happen again. Anybody ever had this problem? What was it?

 

You might need to adjust your clutch a little bit. Doesnt sound like it is disengaging.