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I have an arctic cat zrt 600 triple and I would like to know how to tune the carbs and what tools i will need and where to buy these tools. Thank you.
Gary Oliveira
Answer -
Hello Gary,
I'm not sure if your just tuning your carbs for a performance boost, or if the carbs aren't working to good. If the carbs aren't working right, hard starting, fouled plugs, ruff running, ect., and the fuel wasn't drained or stabalized before winter, you may want to rebuild the carbs, which is alot easier than it sounds. You can purchase the kits from stores like www.denniskirk.com . No special tools are required, a good socket set, screwdrivers, pliers, and wrenches are more than enough. It's just a matter of removing the carbs and taking them apart, cleaning them with carb cleaner and replacing any old parts with what's included in the kit. Let me know if you decide to rebuild them and I'll provide more details, do you know the year of your sled? For tunning, the carbs have to be syncronized as you have three carbs, and I would recomend being very carfull to make sure that you get all the mixture adjusting screws turned exactly the same. Let me know what you decide to do: rebuild or just adjust/tune, and I'll provide all the information I can. Good luck with the sled! Arcticatman
The year of my sled is 1997 and I think that I need to rebuild the carbs.and then tune for performance. I just got the sled last year and I have been having a few problems. I brought it to a repair shop and they said thay cleaned the carbs. That fixed on problem but gave me another. The sled will run good for a while on the trails but then will start to brake up it seems like on one cylinder. So I think I will do both rebuild then tune. I have done a lot of work on cars so I think I will be alright to do this work but any help or tips will be a big help. Thank you.
Gary Oliveira
AnswerHello Gary,
Souds like you have a good plan! The problem you are having is a common one, running on one cylinder. I'm sure you know all the basics, but I'll just list them anyway, for a handy reference. If you continue to experience problems with plug fouling after rebuilding the carbs, you might want to consider using Amsoil or Maxima's Tundra-R- oil, which pretty much eliminates fouling the plugs in a well tuned engine. Also, be sure to use the correct spark plugs, they are: NGK BR9EYA but you could use the BR8EYA, gapped at 0.028 in. Taking your time is a good place to start, you'll always get better results. When you take the float off, shake it, if you hear any liquid inside, it is leaking and needs replacement. I always leave one carb seperate for a refference so I can look at it if I get confussed, and I rebuild that one when I'm finished with the others. Compressed air is a very good thing to use for blowing out all the passageways. Don't be surprised if the inlet needle valve is glued in to it's seat, that is very common, and any rebuild kit should have a new one. Most Mikuni carbs have one screw ( very small, at an angle) called the air screw, and a large one inserted horizontly into the carb that just changes the engines idle speed. The air screw works the opposite of a fuel mixture screw, turn the air screw in and it will richen the mixture, move it out and it will lean the mixture. Here is a link that should help alot, it takes a while to load : http://www.mikuni.com/fs-carburetor.html Let me know if I can help at all! Good luck! Arcticatman
