Hey all -- I'm in search for an ultra low profile carb tuning tool so I can tune the carb on my 2004 Kodiak 450. The adjustment screw faced down and has extremely limited space. I've purchased a 90 degree adjustment tool but it's way too big and won't fit in the tiny space. I wanted to see if anyone has actually used a tool that works not just suggesting searches or the common tools. It's really limited on space there and theres got to be something that will be low profile enough to fit and adjust the screw without taking the carb off each time. Thanks for any information anyone has for me on this. The shops that work on these must use something...

 

You don't adjust it. The slow running mixture screw is set at the factory and will not need any further adjustment. Your Kodiak has been running with that setting for over 20 years, it should continue to do so. Only caveats are if you are at extreme heights, or have modified the engine a lot. Some of the tuning equipment suppliers do make the special screwdrivers but, if you really do need to alter it, most slacken the hose clips, turn the carb round enough to get at the screw and adjust it a bit, try the new setting and repeat until it is right.

 

Hey there.. I pulled the carb off, pulled everything out of it and cleaned it. I think I recall the setting was 2.5 turns out so you're saying I should just do that and that will be good? If I do that and it has some issues running then it must be something else I'm guessing. It didn't run the best when it ran last so I assumed it was the carb. Are there other things that can affect how it runs besides a spark plug? They have electronic ignition don't they? If so, theres nothing to adjust there either.

I remember it was coughing a bit and idle wasn't very stable. From what I remember, it was all over the place. I'll get it fired up again and see how it runs and post with more a more accurate description on what it's doing. Thanks for taking the time to reply.

 

Yamahas are prone to cracked inlet manifolds, so check it, particularly as you have had the carb off and will have pulled at the manifold a bit. I don't remove the mixture screw when cleaning the carb, the jet is in the float bowl, so removing jets and blowing them and the holes they came from out with compressed air, is all you need to do. As you have removed the screw and are not absolutely sure you got it back with exactly the same setting, you may need to alter that slow running mixture screw, but try it and see.