Need help with atc 200s

[yaegerb]

3 things for an engine to run. Spark/Air/Fuel. You have spark and fuel, so is it running an air filter? If so, pull the air filter off and see if it will start without it.

Maybe your air box is full of crap or your filter is clogged.

[brady123]

I have also tried doing everything related to the air filter

[yaegerb]

ok, so if it won't start with starting fluid check your timing. Below I have pasted a link to a "how-to"

http://www.3wheelerworld.com/showthr...tors-with-pics

If timing is good, then you need to start testing your electrical circuit which will be in the manual with the tolerances.

Also, have you checked compression yet?

[atcgirl]

The 200s engine is great and you have it I. A 200x which makes it even better. We have a 1983 200 and we clean the fuel tank and carb and still it fouled out plugs like crazy. Are guess was that someone dumped something in the cylinder to keep it from seizing or something but after changing plugs we eventually got it clean out with running it and changing Olga. So it could be as simple as a carbon up or gum up situation. I have been through 3 plug to clean it runs like a brand new bike

[atcgirl]

Sorry meant on the one changing plugs. Phone doesn't always type right

[mendoAu]

Have you checked to see if your choke is working correctly. Move the choke knob with the air cleaner off and double check. Also I use a spring clamp (http://www.harborfreight.com/media/c...29_zzz_500.jpg) to hold the spark plug tightly to the engine block and check for a really good spark, preferably in the dark, to make sure that it is consistant and bright white/blue. It sometimes is hard to pull start and hold at the same time. And also make sure your exhaust is not plugged up. With the exhaust valve open use your compresser thru the plug hole and you should be able to tell at the muffler.

[brady123]

It's no longer fouling plugs oddly. In the rare occasion that it does run for a couple seconds the plug comes out completely unchanged, while it used to be completely fouled by that point. The tank has been cleaned and is full of new gas. The choke operates correctly and smoothly, and the exhaust is clean. I have definitely never had an engine give me so many problems.

[brady123]

Well everybody, it ran last night for about 2 minutes. Sounded great, no ticks, no leaks, plenty of power. Then, it slowly coughed out, and won't even consider running now. What could the problem be????

[Thunder]

If you've got it firing and running for a short period of time I think your best bet now would be to pull and give the carb another good cleaning. Also pull the pet cock from the tank and check the fuel filter and if necessary drain and clean the tank. With any luck that'll solve your problem. Just have to keep going through it... And get some new plugs lol. As dumb as it is I've bought packs of plugs where neither of them were good.
If you do all that and still nothin I'd say check the little black cdi box. You can find replacements pretty easy online

[mendoAu]

In the spirit of the Xmas season I have a new CDI Box for Honda ATC 200M / ATC 200S / ATC 200X 1983 1984 1985 on my work bench right now that I could mail to you, if it works I paid 21.00 dollars for it, if it doesn't work all you will be out is the return postage to me. The closest post office is ten miles away and if the snow/ice is off the road I'd take a trip just to check out the creek that is really ripping right now. Everything you have mentioned seems just like that little black box that tends to not work, kinda works, and then works until it gets a little engine heat/internal heat and craps out. You can also find these units cheaper on e-bay but my offer is "risk free", just PM me if interested.

******I just remembered you have an 86 and probably has a "two-piece" connector at the cdi....the one I have is a six pin round so......

[brady123]

Thank you very much mendoAu for the offer. That means a lot that you'd be willing to do that for me. However, I just ordered a brand new cd box for it off ebay and (fingers crossed) it will solve the problem! I just want to ride the darn thing so bad, and ice fishing season is right around the corner and we all know im sure as hell not going to walk to all of my flags! Thanks again everybody for the input.