I have a 2003 Kodiak 450. It starts fine, but is seems to have two issues. First, is that if I push the choke all the way off, it dies. Second, is that while it idles fine with a bit of choke, the moment I touch the throttle it dies.


If I hit the throttle hard I can bypass the "bog" and it will run...but if I try to accelerate normally it'll die immediately.


This just started recently, after it sat for a few weeks. I run only non-ethanol fuel in it, if that matters.

 

Sounds like the pilot may be a bit stopped up. How did it run before you let it sit for the few weeks? And if one can, its alway better to run the non-ethanal.

 

It's always run great. Starts right up an pure like a kitten...hot, cold...doesn't matter. This is the first issue I've ever had with it.

 

Is it really cold where you are? Is the ATV parked outside? Could have a little water in the fuel. What's the condition of the battery? Is it 12.4VDC or greater ( not running )? Whens the last time you changed the spark plug?

 

It was fairly warm here when the condition started. It's parked outside. New battery a few weeks ago, and I changed the spark plug last year. The plug probably doesn't have 20 miles on it.

 

Then more than likely you need to pull the carb and give it a good cleaning. At that age, would be a good idea to at least replace the bowl "O" ring and the needle and seat but, I recommend cleaning the main and pilot jets unless you purchase a good quality kit. I prefer to clean and reuse those jets because seems like nothing is as good as stock....again depending on the quality of the rebuild kit that you purchase.

 

Best kits out there equivalent to oem parts are Shindy. Made in Japan same as Keihin and Mikuni carbs are.2003 2006 Yamaha 450 Kodiak Auto 4x4 Carb Carburetor Repair Kit YFM450 03 317 | eBay