Are all years of the kawasaki bayou 220 ATVs 2 or 4 stroke engines do they need a gas and oil mixture?

Here's why:

* 4-stroke engines have a separate oil sump for lubrication, which is why they don't require pre-mixing oil with gas.

* 2-stroke engines rely on the gas and oil mixture to lubricate the engine.

So, regardless of the year, all Kawasaki Bayou 220 ATVs will have a 4-stroke engine and you'll need to add oil separately to the engine.