Suzuki Lt50

Just to confirm that it is quad: http://www.mcnews.com.au/newbikecatalogue/2002/Quads_Junior_Buyers_Guide/Suzuki_LT50_700p.jpg

Without seeing the article I will try to tell you. On the carbohydrate content, when you open / close the gas, you'll see a link. It has a screw on which rests against the main body of the carb. You should be able to adjust it a little slow.
hope this helps, difficult to put into words, sorry.

Usually on the left side below and slightly forward of the seat, you'll see a screw and a spring, is where you set to idle stronger.

The screw with the carbohydrates spring