I prefer not to go quite so heavy... especially here in temperate WA.
Shell Rotella T is available in 15W40 in jugs at wallyworld, too - and is usually cheaper than Mobil1. Diesel rated oils don't have friction modifiers and have a high shear strength suitable for bikes like Bandits that share engine and gearbox oil.
You don't normally find the friction modifiers in oils 40 weight and heavier - especially if you go with a diesel rated oil.