According to the Kawasaki site you should use SE class SAE 10W40, 10W50, 20W40 or 20W50 oil for the engine. You use SAE 10W oil for the front fork.
yes read your owners manual hotter the thicker the oili use 10w40 and 50 check with your mechanic on 20w40 and 50
You can buy 20w40 oil. Mercursier, Yamalube, Amsoil, and other synthetic oils come in this weight. Or you could just use 10w40 if 20w40 is recommended.
20w50
20w50
Affirmtive. 10w30 is fine for temps of 40-80*f. Below 40*,i'd go to a 10w20 or a 5w20. 0* and below i'd use 5w10. Over 80* i'd use 20w40 or 20w50.
20w50 Harley Davidson motor oil If you can't get H-D brand oil, you could use any brand 20w50. Stay away from synthetics. I stuck with H-D 20w50. Good luck!
Any motorcycle oil with the weight 20W50. I use Valvoline 4 stroke motorcycle oil 20W50 and it works fine!
Use only what the manufacture recommends and nothing else.
20w50
20w50
You can, but I think 10w40 will be better.