atc 200es running bad

**daniel_250r** · 12-03-2009, 05:01 PM

hey guys i have an atc 200es with a cobra pipe that is running very bad, i set the needle clip 2nd down, plugs pitch black. set it at the very top and its still black and its back firing badly. also in both situations its putting out some black smoke. i have tried adjusting the air mixture screw but its no dice. any ideas?

**Thorpe** · 12-03-2009, 08:42 PM

Put it all back the way it was, and read this thread....

http://3wheelerworldforums.com/showthread.php?t=55086

**daniel_250r** · 12-03-2009, 09:42 PM

i have read that before but this thing still runs terrible at any setting

**Thorpe** · 12-03-2009, 10:08 PM

Are you compensating jet size?

**daniel_250r** · 12-03-2009, 10:14 PM

i have not rejeted at all, its running stock carb wise and a larger cobra pipe. keep in mind i have never had this thing running before. my thoughts would be it should be running lean from the pipe and just need the clip moved

**posty2100** · 12-03-2009, 11:27 PM

timing could also be off if you haven't ever had it running, check you manual for setting the timing and set carb back to stock

**daniel_250r** · 12-03-2009, 11:28 PM

i got it with a bent valve and i reset the timing and made sure it was right many times

**Thorpe** · 12-03-2009, 11:29 PM

The clip on the needle is only controlling the mid range... You arent compensating for the higher revs and the low end... Do you have your airbox and filter in place? Have you rebuilt the carb?

**daniel_250r** · 12-03-2009, 11:44 PM

i havent rebuilt the carb. one thing i did notice when i was tearing the top end down was that it was covered in carbon everywhere. i;m running a stock filter set up with a oem style filter

**Thorpe** · 12-04-2009, 03:45 AM

Rebuild your carb.

**oscarmayer** · 12-04-2009, 09:14 AM

i agree, you probebly have a very worn carb and need a rebuild kit. they are liek $20 for one off ebay witht he pre-formed bowl gasket.

bikebandit also has the pre-formed gasket kits for it for like $20 shipped as well.

**daniel_250r** · 12-04-2009, 10:00 AM

alright thanks guys i will have to order one btw here is a vid of the trike running this was with a fresh plug so it ran very well at first http://www.youtube.com/watch?v=rpZPnBYMk_Y

**daniel_250r** · 12-08-2009, 07:15 PM

alright guys i bought a brand new carb for it, it started and reved fine, idled high, gave it a good rev and it died. took out the plug its black. what the hell?!??! it now won't even rty to start the plug is wet it has a blue spark when i hold it to the exhaust but i didnt see a spark when i held it to the motor. please help guys! btw the airfilter is brand new too. ready to burn this in my drive way!~

**daniel_250r** · 12-08-2009, 09:00 PM

well i put another plug in it fired up and same thing it back fired alot idled high and rough, and after it died the plug was black and dry

**Thorpe** · 12-08-2009, 09:33 PM

Did you oil your new filter? (didnt over oil it, did ya?) Is your choke circuit staying on?

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atc 200es running bad