Well since its Yamaha always go with yamalube synthetic oil
Answer 2Unless you can find a Better Synthetic oilstock yamalube 4 stroke oil for the transmission only
2 cycle.... since it a 2 stroke
plain 2 cycle oil
a CR80 is a two stroke so you normally don't put oil in the crarckcase. However honda, yamaha, bel-rey, and a bunch of other companies make special transmission oils for them
Yamaha
Yamaha Blasters take unleaded gas only.
15w/30 but that is hard to find so I use15w/40
10W-40 motor oil
20/50 or 20/30
4cycle
Chase Rocks
you dont put any oil into a kawasaki crankcase, the 2 stroke that is pumped into the engine lubricates the crank, and all the other internals of the engine.