I change the transmission oil on my yamaha blaster and after changing the oil it only goes up to 3rd gear?

i aded w80 2 stroke oil to the transmission thats what they told me to ad at a motorcycle place.


a blaster is a yz200 quadI change the transmission oil on my yamaha blaster and after changing the oil it only goes up to 3rd gear?
First thing to check would be the owner's manual, to see if they told you the right oil to put in it.I change the transmission oil on my yamaha blaster and after changing the oil it only goes up to 3rd gear?
you might have too much oil in it....