1985 Honda ATC 200s- only runs on full choke

[salisbury4573]

Hey guys, my ATC 200s will only run on full choke. I have taken the carb apart twice and cleaned it and cleaned it again very thoroughly. My air filter is just a metal mesh tube, is that bad? Could that cause it to only run on full choke? Also, when I set the needle valve I set it at 2.5 turns out.

Anyone have any advice on how to get this machine to idle and run properly? I have rebuilt the entire rest of this bike, and the only thing keeping it from being ridden is this carb/ air to fuel issue.

Any tips, help suggestions would be greatly appreciated.

Thanks,

Aaron

[Dirtcrasher]

Yes thats bad, allows for more air and creates a lean condition; most likely the reason you need full choke which blocks off the air and allows for more fuel.

If you want it to last, get yourself an air filter. You don't like breathing in a bunch of crap do you? nor does your motor...:D

[aaronsink12306]

Yes thats bad, allows for more air and creates a lean condition; most likely the reason you need full choke which blocks off the air and allows for more fuel.

If you want it to last, get yourself an air filter. You don't like breathing in a bunch of crap do you? nor does your motor...:D

i agree get a uni filter $20 bucks tops but will save you alot in the long run having to rebuild the engine because you got it gunked up with the crap it would be sucking in

[bigworm626]

Oh! Nicely put Dirtcrasher. Uni-filter is the best investment youcan have on your trike.

[salisbury4573]

I will do that right away, I kinda thought that the metal filter element was kinda weird. I will get the unifilter on the bike before I try and run it again.

So you guys think that will fix most of the problem with it running only on full choke? Its been giving me fits because I know I cleaned that carb really well.

So is 2.5 turns out the correct needle adjustment?

[aaronsink12306]

i always use like 1 1/4 turns to start with on pretty much anything I work on force of habbit I guess but I wouldnt start with any more than 2 turns out and go from there and yeah the filter should help alot

[Dirtcrasher]

Typically once your more than 2 turns out, the pilot jet is too small.

In your case your trying to compensate for too much air from the lack of a filter.

[salisbury4573]

Got it, I will get the filter first thing, then if that doesnt seem to help enough, I will try working with the needle a bit.

Thanks a ton for the help guys, I am new to trikes but am very interested in learning all I can.

Thanks again, once I get the filter on I will provide an update.

[MonroeMike]

Pages 81-82.

http://www.3wheelerworld.com/showthread.php?126290-ATC185-200-Service-Data

[salisbury4573]

Hey guys, the UNI filter made a ton of difference. Its still got a couple small bugs to work out, but it ran ok enough I could ride it and it went thru all the gears.

This bike sat outside for 2 or 3 years without running, was actually suprized I even got it to run. That really says something about these hondas.

Couple questions. Is the port on the side of the carb near the choke a vaccum port? It looks like it goes into the bowl area of the carb above the fuel level. should I plug this off, or does it need a line run somewhere?

The bike is still kinda herky jerky, not running perfect, it wants to act like its not getting fuel perfectly and also wants to jump into choke. I can fix the choke thing, hell I will wire it open if I need to. But what I suspect is a vaccum line is my main question. Any ideas?

Thnks,

Aaron

[MonkOFox]

I don't think you need to put a hose on that port. If you look at the exploded diagrams it shows a tube with a clip put on it. I don't have a tube on mine but I'm probably doing it all wrong.

Justin

[salisbury4573]

I think I will messa round with it, I will put a cap on it and see how she runs.

[AtcFactoryRacer]

Also make sure your gas cap is in the "ON" position when the bike is running, this allows the fuel tank to vent. My atc70 will only run on choke if the gas cap is turned "OFF" and will bog down and die when i try to give it gas.

[aaronsink12306]

it is a vaccum line ive had them both plugged and with a tube on it doesnt seem to make any differance and and by jerky what excatly do you mean if it seems like its not getting enough fuel there might be some gunk left in there blow the carb out real good and give it a try

[salisbury4573]

By jerky I mean its throttle response makes it hard to ride, almost like you have to pump the throttle to keep it running. Its not a smooth throttle at all. Makes it hard to ride, I have only taken it up and down the street a few times, maybe 20 minutes of total run time since the last time I cleaned the carb.

I will take the carb off again and clean and blow it out, see if that works, but honestly I am damn tempted to buy one of the replacement carbs from ebay. There are a few on there for like $20 plus shipping. Does anyone have any experience with ebay carbs? Are they junk?

[MonkOFox]

I've bought 2 ebay carbs, they work fine. You may have to adjust the idle a bit. Is the throttle hard to hard to press? Make sure it's not getting pinched between the frame and the gas tank. I would remember what all the settings are for the jets and stuff and pull them out and soak them in some cleaner for a while... Then blow em out. Clean the throttle slide real good too (and inside the carb cylinder).

You can go here:

http://oscarmayer.net/atc/manuals/honda/ATC200S%2084-86%20Shop%20Manual.pdf

To see what the manufacturer specs are for the jets and etc...

[Thorpe]

Rather than clean the carb, buy a rebuild kit...

[MonkOFox]

If you're going to buy something, just get this:

http://cgi.ebay.com/ebaymotors/Carburetor-HONDA-ATC-200-ATC200-ATC200S-200S-Carb-L-_W0QQcmdZViewItemQQhashZitem3368077ce3QQitemZ22078 8653283QQptZMotorsQ5fATVQ5fPartsQ5fAccessories

26 bucks and hopefully no fiddling...

[salisbury4573]

Yep, thats the one I was gonna buy. I read a few reviews around here and they seem to be fine if you get the right one for your bike. I am gonna clean that carb one more time though. This entire project was supposed to be on the cheap, and I have managed to keep it that way so far. I have a whopping $350 in the entire project. Got the 85 200s, an 83 200m and a 82 atc 185.

The 200m and the 185 have been stripped down pretty far, still have motors and clean frames and other odds and ends, but I think I am doing ok as far as total money invested goes.

I will clean the carb I have and give it a go, if it doesnt work, I am probly gonna go with ebay carb.

Thanks for the responses guys. This site has been a huge help!

[salisbury4573]

MonkOfox, the throttle isnt hard to press or pinched at all. The bike just isnt getting the correct fuel for some reason.