For a Yamaha Breeze, it's recommended to use SAE 10W-40 oil, which is suitable for most riding conditions. Make sure to use a high-quality motorcycle oil that meets the necessary specifications, especially for four-stroke engines. Always check your owner's manual for specific recommendations and oil change intervals.
Yamalube motor oil.
I use 10W30 in my 1989 Yamaha Warrior.
yamalube is the best
21/2qrts 20w50
10w-40
Use 10w40 4-stroke motorcycle oil. DO NOT use any type of automotive oil; motorcycle oil is needed because of the wet clutch.
sae 30
trochoid
winter- 5w30 summer-10w30
10w30 synthetic would be my recommendation.
use good quality 2-stroke pre mix (tcw2/tcw3) tcw2 semi synthetic oil tcw3 full synthetic oil I use klotz tcw2 in my 72 Yamaha r5
You have to read the user manual and then concern your mechanic.