50cc running rich,,,,, i think

justinkr58 · 02-03-2009, 08:36 PM

i have a 50cc lifan scooter, hard to start and keep running for 5-10 min.
gotta really feather the throttle for 10 min until it stays running, smells (rich).

I would think this is an easy fix, it is an 08 50cc with 600 miles,,

IronFist · 02-04-2009, 06:48 PM

What does the plug say?

Pull the spark plug and check the color. Is it black, white, or a coppery brown?

justinkr58 · 02-04-2009, 10:36 PM

here are some pics,, the plug doesnt look bad to me

IronFist · 02-04-2009, 10:46 PM

Very blurry, but you are looking lean to me. Is your carb needle adjustable? You might need to re-jet.

You could also check the intake and exhaust manifolds for leaks, if air is getting in you will have a lean condition too. :wink:

justinkr58 · 02-04-2009, 10:59 PM

is that gap small to you ? factory plug.

justinkr58 · 02-09-2009, 08:47 PM

so does a black pluc mean it is lean?

phil · 02-09-2009, 08:54 PM

just some thoughts i think i would just change the plug since its out and put up with the cold nature and see if it gets worse i have a theory about the carbs on lifan if it gets worse contact me pm if you dont get my attention right away if you want to hide the problem (and maybe cure it) run some av gas or racing gas for a tankfull

warrior91 · 02-09-2009, 09:50 PM

Black with a white tip....looks lean to me...Black sooty with black sooty tip means rich...rich Chocolate brown is a good plug color.

justinkr58 · 02-09-2009, 10:56 PM

so if its lean because black with white tip, should i move the needle in/or out? or os there a different way to cure this?

warrior91 · 02-09-2009, 11:01 PM

circlip down, or Main jet size up...
I am just surmising this asthe first 2 pics are not the best.
I Think I can see deposits on the plug but they are too blurry.

First thing is run a new plug if you can and check it for color.

02-03-2009, 08:36 PM	#1
justinkr58 Join Date: Apr 2007 Location: mn Posts: 183	50cc running rich,,,,, i think i have a 50cc lifan scooter, hard to start and keep running for 5-10 min. gotta really feather the throttle for 10 min until it stays running, smells (rich). I would think this is an easy fix, it is an 08 50cc with 600 miles,,
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02-04-2009, 06:48 PM	#2
IronFist Join Date: Apr 2007 Location: Toronto Ontario Canada Posts: 2,585	What does the plug say? Pull the spark plug and check the color. Is it black, white, or a coppery brown? __________________ IronFist ___________________________________ The "chain" of command is used for beating spammers. ___________________________________
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02-04-2009, 10:46 PM	#4
IronFist Join Date: Apr 2007 Location: Toronto Ontario Canada Posts: 2,585	Very blurry, but you are looking lean to me. Is your carb needle adjustable? You might need to re-jet. You could also check the intake and exhaust manifolds for leaks, if air is getting in you will have a lean condition too. :wink: __________________ IronFist ___________________________________ The "chain" of command is used for beating spammers. ___________________________________
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02-09-2009, 08:54 PM	#7
phil Join Date: Jun 2008 Location: wise va Posts: 636	just some thoughts i think i would just change the plug since its out and put up with the cold nature and see if it gets worse i have a theory about the carbs on lifan if it gets worse contact me pm if you dont get my attention right away if you want to hide the problem (and maybe cure it) run some av gas or racing gas for a tankfull __________________ halls auto l coolster, modcycles, yanmar & zongshen, dealer fired roketa,lifan and jet moto and apollo quit me who's next
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02-09-2009, 09:50 PM	#8
warrior91 Join Date: Nov 2007 Location: N.E. Saskatchewan, Canada Posts: 679	Black with a white tip....looks lean to me...Black sooty with black sooty tip means rich...rich Chocolate brown is a good plug color. __________________ '91 Yamaha Warrior- stage 2 '83 Honda ATC 70 '08 Yongjiang 125cc mx (Loncin) '08 Yongjiang 150cc atv (Jinlong)
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02-04-2009, 10:36 PM	#3
justinkr58 Join Date: Apr 2007 Location: mn Posts: 183	here are some pics,, the plug doesnt look bad to me
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02-04-2009, 10:59 PM	#5
justinkr58 Join Date: Apr 2007 Location: mn Posts: 183	is that gap small to you ? factory plug.
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02-09-2009, 08:47 PM	#6
justinkr58 Join Date: Apr 2007 Location: mn Posts: 183	so does a black pluc mean it is lean?
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02-09-2009, 10:56 PM	#9
justinkr58 Join Date: Apr 2007 Location: mn Posts: 183	so if its lean because black with white tip, should i move the needle in/or out? or os there a different way to cure this?
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02-09-2009, 11:01 PM	#10
warrior91 Join Date: Nov 2007 Location: N.E. Saskatchewan, Canada Posts: 679	circlip down, or Main jet size up... I am just surmising this asthe first 2 pics are not the best. I Think I can see deposits on the plug but they are too blurry. First thing is run a new plug if you can and check it for color. __________________ '91 Yamaha Warrior- stage 2 '83 Honda ATC 70 '08 Yongjiang 125cc mx (Loncin) '08 Yongjiang 150cc atv (Jinlong)
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