what motor oil dose the manual recommend, I want to be sure its not synthetic

 

I can's say for sure cause I don't have a kawasaki but I would be suprised if any mfg. doesn't run synthetic. I know polaris does though.

 

Besides cheaper to buy,conventional oil is inferior to Synthetic oil in every way.

 

Synthetic
4 Stroke Oil 0W40

 

Its really up to you what you want to run i usally run just a normal 10w30 honda or yamaha oil until the machine is good and borke in then once broken in go with a full syenthic this has worked great for me and the prices arnt to bad at rocky mountain expecially with there free shipping.ATV Parts, ATV Tires, Dirt Bike Parts & Motocross Gear | Rocky Mountain ATV/MC

 

From my 2010 Kawasaki Brute Force 750 Manual:

Engine Oil

Grade: API SG,SH,SJ,SL, or SM with JASO MA, MA1 or MA2

Viscosity: SAE 10W-40


The important part of the information above is the "JASO" rating. That is the rating used by the Japanese Automobile Standard organization. Do a search of "JASO" and you will find a lot of information on why to use a JASO certified oil in motor bikes.

From one of the web sites I came across: Synth oils meant for cars when used in bike will cause clutch to slip because car synth oils have friction reducers which are not required in wet clutch motorbikes. The oil in wet clutch motorbikes need the oil only as a coolant not a lubricant . The lubing is required for the engine and not the clutch in this case.

Now, I will be honest, I have absolutely no clue whether there are or aren't wet clutches in my Brute Force. So, for now I will buy my oil certified with the JASO standard from the dealer and not worry about it.