Okay I found out valvolin Mortocycle oil 4 stroke works great I have an 1981 yz 80 and its been good to me..it specifically says good for wet clutches..
The YZ 80 is faster. It has a wicked power band.
yz 80 B
different cc
16.5 oz for oil change 18.5 oz if the case has been opened
Sae 10w/30 "se" or "sf" motor oil
yz
so of them will
I have a yz 80 2001 small wheel and does about 75 mph
Using the right fluid in a vehicle, will keep it working well. The 1984 YZ 80cc 2 stroke, uses 80/85W gear oil.
2001
yz 80