Kawasaki 300 bayou won't rev up.

first I'd clean the carb, new spark plug. I've seen a bad cdi cause that but thats the last thing I'd check cause $$$

Hi Abbott:
You've gotta be close. Let's double check.
- Pull the plug(s) and make sure they're not fouled and that there is a nice hor blue spark across the electrode.
- Fresh gas in the tank
- flush the carb (drain plug)
- Fuel filter if there is one.
- Clean the air filter.
Put it back together and give it a try. If it runs, great, if not, pull a spark plug and see if it is "wet" with gas. If not, the problem will probably be with gummy bad stuff in the carb. Take it off, and an air hose to try to blow out all the little passages.
Keep smiling, you'll be killing bugs in no time!

Just a quick check, could there be air getting inbetween the carb and motor? Sometimes it could be leaning out? Just a thought?

!. New spark plug
2. New or CLEAN air filter
3. CLEAN and properly set carb.
4. Air screw should be about 2 turns out AFTER lightly seating.
5. Adjust idle speed to your liking, but not too high.
6. Refinement is made with 1/4 turns of the air screw.

Had a similar problem, I rebuilt the carb and fixed any gaps/cracks in the intake boots and carb-engine gasket. runs ok now

buy a bottle of gasline anti-freeze. it will absorb any water in your fuel. add a half a bottle now and a half next time you fill the tank. should improve the operation of the engine

Have you chkd the timing.? The plate hat the oints mount on does move sometimes and the rub block on the points wear and changes the timing. That is if this bike has points.

try playing with the mixture screw on the carbs this pic below will help you buddy get back to me if no difference