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02-03-2009, 08:36 PM | #1 |
Join Date: Apr 2007
Location: mn
Posts: 183
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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 |
Join Date: Apr 2007
Location: Toronto Ontario Canada
Posts: 2,585
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What does the plug say?
Pull the spark plug and check the color. Is it black, white, or a coppery brown?
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IronFist ___________________________________ The "chain" of command is used for beating spammers. ___________________________________ |
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02-04-2009, 10:36 PM | #3 |
Join Date: Apr 2007
Location: mn
Posts: 183
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here are some pics,, the plug doesnt look bad to me
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02-04-2009, 10:46 PM | #4 |
Join Date: Apr 2007
Location: Toronto Ontario Canada
Posts: 2,585
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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:
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IronFist ___________________________________ The "chain" of command is used for beating spammers. ___________________________________ |
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02-04-2009, 10:59 PM | #5 |
Join Date: Apr 2007
Location: mn
Posts: 183
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is that gap small to you ? factory plug.
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02-09-2009, 08:47 PM | #6 |
Join Date: Apr 2007
Location: mn
Posts: 183
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so does a black pluc mean it is lean?
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02-09-2009, 08:54 PM | #7 |
Join Date: Jun 2008
Location: wise va
Posts: 636
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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
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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 |
Join Date: Nov 2007
Location: N.E. Saskatchewan, Canada
Posts: 679
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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.
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'91 Yamaha Warrior- stage 2 '83 Honda ATC 70 '08 Yongjiang 125cc mx (Loncin) '08 Yongjiang 150cc atv (Jinlong) |
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02-09-2009, 10:56 PM | #9 |
Join Date: Apr 2007
Location: mn
Posts: 183
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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 |
Join Date: Nov 2007
Location: N.E. Saskatchewan, Canada
Posts: 679
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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.
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'91 Yamaha Warrior- stage 2 '83 Honda ATC 70 '08 Yongjiang 125cc mx (Loncin) '08 Yongjiang 150cc atv (Jinlong) |
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