I use Shell ultra 4 10W/40 on my 1600 Classic. A mechanic told me it's one of the best oil in the world... don't know where he got that, but another guy working for Shell explained to me of their heavy testing on their products. Made at least me think it's a quality product for sure.
I change myself the oil every 3000 to 3500 miles. Kawasaki has on their manual 7500 km as oil change interval but that's quite too much for me.
Oh yeah, you Meanstreak owners. Where does your speedo cable (or has it a cable?) go to on the engine? I need an accurate position since the Classic and Meanstreak has virtually identical engine (different top end) and would like to look if I've got a place for a tachometer cable also.
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