I just got a 2003 kaw kx250 2 stroke I don't know what the fuel mixture is?

I have also heard that different kinds of oil will have a different mixture is this true?

25ml of 2 stroke oil to 1 litre of fuel

Kawasaki recommends 32:1http://www.kawasaki.com/Home/Home.aspxGo to - OWNER INFO - Parts Diagrams - (your bike) - Specifications.Don't use the crap you can buy in discount stores like Walmart.Use brand name 2 cycle oil made for motorcycles.

ive done 32:1 and 40:1 and as much as 50:1 on a cr 500 but that was bored out with the 50:1. I would research some more, but your probably be alright with most common mixtures

go to your local shop and purchase a"ratio cup". it will take all the guess work out of it. as stated already 32 to 1 is a safe mix. here is an example of a ratio cuphttp://www.motorcycle-superstore.com/2/9/422/12485/ITEM/Maxima-Quick-2-Mix-Ratio-Cup.aspx