Okay I’ve had my 900 for about 6 months now. I’ve made two oil changes first was with Mobil 1 10w-40 I had that oil in for about 500 miles due to wanting to flush out the engine a bit considering bike was low mileage and a bit old. With Mobil 1 I experienced clunky shifts for the first 20 minutes of riding. Second change was valvoline 10w-40 full synthetic with this oil I don’t get clunky shifts when the bike is cold but really clunky down shifts. Want to try other oils and want to know what you guys have experienced with others and witch work best.