Dying and coughing, and spitting

undertulsa · 09-25-2009, 10:46 PM

Ok, bike will start and run for a while then it dies constantly, backfiring, running rough coughing. dumped fuel cleaned filter, still doing it, have new ngk spark plug, tried 3 different cdis i have in stock to no avail.

totally stumped!

bike has 1300 mi owned since new, tired new gas no solution. :roll:

forchetto · 09-26-2009, 01:09 AM

Those symptoms are exactly what you get if there's water or other matter blocking one of the carbs jets. Probably the idle jet as this is very small.

It happens a lot to people that have ditched the air cleaner and replaced it with pod-type filters. If they get wet through rain or washing, the water droplets get sucked into the carb and a tiny bit of water can block a jet.

The ideal thing is to dismantle the float chamber and jets and blow through them to clear the blockage.

An old dodge is to remove air filter, get the revs as high as you can considering the fault, and immediately block the carb intake with your hand. The suction that results usually clears the blockage.

undertulsa · 09-26-2009, 10:13 AM

Anyone know of some good threads about checking carbs, valves? gy200 2007 A.

Thanks!

undertulsa · 09-26-2009, 10:14 AM

Do I have to drain tank to work on carb?

katoranger · 09-26-2009, 12:34 PM

Quote:

Originally Posted by undertulsa

Do I have to drain tank to work on carb?

Just need to turn the fuel off on the petcock.

Allen

Reveeen · 09-26-2009, 12:49 PM

Adjust the valves.

undertulsa · 09-26-2009, 02:08 PM

Ok something definately wrong black smoke, bike will idle but dies if i give it any gas like it cant get gas?

can anyone give me some valve adjustment instructions. do i need any special tools, and basically i know how to remove cover but thats about it, anyone know of threads that show me how to do this right?

videos would even be better, any reason i shouldnt just take this to the bike shop as i could really mess it up.

need your advice guys.

katoranger · 09-26-2009, 02:39 PM

Black smoke usually means too rich.

katoranger · 09-26-2009, 02:40 PM

Valve adjustment tutorial.

http://chinariders.net/modules.php?n...ewtopic&t=1655

undertulsa · 09-26-2009, 03:34 PM

well Ill get after it, do i need something to like a spacer to measure, micrometer or something to adjust them. anyone know what the specs for 2007 gy 200 A are?

undertulsa · 09-26-2009, 03:43 PM

do i need one? feeler gauge, what mm do i need for the lifan 2007 gy200 a?

undertulsa · 09-26-2009, 03:46 PM

ok if i have it too rich theres a possibility that i dont need to adjust valves at all right? how do i get a leaner mixture? is this a carb adjustment?

how about a carb thread?

Thanks guys realize this is pain but really need the help. Might start with that as i think carb is problem.

undertulsa · 09-26-2009, 04:19 PM

looks pretty easy just need that tool. think my bike is .04 mm can anyone confirm?

Still think my carb needs adjusted think its running rich as Kato suggested, think my prob is carb less valve adjustment

FastDoc · 09-26-2009, 05:32 PM

I very much do not think it's related to the valves. Something is gummed up in the carb, I'd start there.

undertulsa · 09-26-2009, 06:02 PM

I agree, starting to dismantle the carb, god help me!! wish me luck because this is a long way from anything ive done so far.

09-25-2009, 10:46 PM	#1
undertulsa Join Date: May 2009 Posts: 219	Dying and coughing, and spitting Ok, bike will start and run for a while then it dies constantly, backfiring, running rough coughing. dumped fuel cleaned filter, still doing it, have new ngk spark plug, tried 3 different cdis i have in stock to no avail. totally stumped! bike has 1300 mi owned since new, tired new gas no solution. :roll:
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09-26-2009, 01:09 AM	#2
forchetto Join Date: Jul 2008 Location: Gijon, Asturias,Northern Spain Posts: 396	Those symptoms are exactly what you get if there's water or other matter blocking one of the carbs jets. Probably the idle jet as this is very small. It happens a lot to people that have ditched the air cleaner and replaced it with pod-type filters. If they get wet through rain or washing, the water droplets get sucked into the carb and a tiny bit of water can block a jet. The ideal thing is to dismantle the float chamber and jets and blow through them to clear the blockage. An old dodge is to remove air filter, get the revs as high as you can considering the fault, and immediately block the carb intake with your hand. The suction that results usually clears the blockage. __________________ Jincheng Monkey JC50Q-7 (two of them) Skyteam Dax replica ST110-6 (two of them) Zongshen ZS125-43 Qingqi QM200GY-BA Super Motard Yamaha Virago XV1100 Triumph Bonneville SE Qingqi QM110GY PGO Bug rider 250 Buggy
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09-26-2009, 10:13 AM	#3
undertulsa Join Date: May 2009 Posts: 219	Carbs and Valves Anyone know of some good threads about checking carbs, valves? gy200 2007 A. Thanks!
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09-26-2009, 10:14 AM	#4
undertulsa Join Date: May 2009 Posts: 219	Gas Do I have to drain tank to work on carb?
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09-26-2009, 02:08 PM	#7
undertulsa Join Date: May 2009 Posts: 219	black smoke Ok something definately wrong black smoke, bike will idle but dies if i give it any gas like it cant get gas? can anyone give me some valve adjustment instructions. do i need any special tools, and basically i know how to remove cover but thats about it, anyone know of threads that show me how to do this right? videos would even be better, any reason i shouldnt just take this to the bike shop as i could really mess it up. need your advice guys.
	0

09-26-2009, 12:49 PM	#6
Reveeen Join Date: Jun 2009 Location: orbital platform Posts: 741	Adjust the valves.
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09-26-2009, 02:39 PM	#8
katoranger Join Date: May 2007 Location: Altamont, Kansas Posts: 15,103	Black smoke usually means too rich. __________________ You meet the nicest people on a Honda Clone.
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09-26-2009, 02:40 PM	#9
katoranger Join Date: May 2007 Location: Altamont, Kansas Posts: 15,103	Valve adjustment tutorial. http://chinariders.net/modules.php?n...ewtopic&t=1655 __________________ You meet the nicest people on a Honda Clone.
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09-26-2009, 03:34 PM	#10
undertulsa Join Date: May 2009 Posts: 219	thankS well Ill get after it, do i need something to like a spacer to measure, micrometer or something to adjust them. anyone know what the specs for 2007 gy 200 A are?
	0

09-26-2009, 03:43 PM	#11
undertulsa Join Date: May 2009 Posts: 219	feeler gauge do i need one? feeler gauge, what mm do i need for the lifan 2007 gy200 a?
	0

09-26-2009, 03:46 PM	#12
undertulsa Join Date: May 2009 Posts: 219	too rich ok if i have it too rich theres a possibility that i dont need to adjust valves at all right? how do i get a leaner mixture? is this a carb adjustment? how about a carb thread? Thanks guys realize this is pain but really need the help. Might start with that as i think carb is problem.
	0

09-26-2009, 04:19 PM	#13
undertulsa Join Date: May 2009 Posts: 219	two china bike valve adjustment videos. looks pretty easy just need that tool. think my bike is .04 mm can anyone confirm? Still think my carb needs adjusted think its running rich as Kato suggested, think my prob is carb less valve adjustment
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09-26-2009, 05:32 PM	#14
FastDoc Join Date: Mar 2009 Location: Southeastern Washington desert Posts: 14,761	I very much do not think it's related to the valves. Something is gummed up in the carb, I'd start there. __________________ Happy to serve.
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09-26-2009, 06:02 PM	#15
undertulsa Join Date: May 2009 Posts: 219	Concur I agree, starting to dismantle the carb, god help me!! wish me luck because this is a long way from anything ive done so far.
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