My 100CC Lifan won't start

red85 · 04-09-2009, 07:51 PM

I had to remove the handlebars in my Lifan GY 100and now it won't start. I checked the plug and it's wet. I sprayed it down with brake clean and that didn't do a thing. I just don't think I have any spark, but my spark tester is in my box at work. Any suggestios about what I might try!

phil · 04-09-2009, 08:07 PM

look at all solder spots on the controls mounted to the handlebars i had a problem with my lf110 i reccomend taking ALL the electrical connectors loose filling them with dielectric or litihum grease and plug them back and use a zip tie to hold them together and you have saved yourself more problems than you realize :wink:

red85 · 04-10-2009, 04:58 PM

It's still not starting. I have been playing around with it this aft and it actually fired up one time. Now it seems that it's over fuelling and drowning my plug. I'm really at a loss here. I'm a car mechanic not a bike mechanic. I started this whole ordeal when I went to replace a broken throttle control. Since that oint it's all gone sounth on me. Any ideas?

phil · 04-10-2009, 06:55 PM

we need to know if its getting fire to the plug but if it fired once and wont again my guess is a fouled plug

red85 · 04-10-2009, 07:17 PM

I agree. What do I do to keep it from fouling? The mixture screw on the carb is about 1/4 turn out. Do I need to look for another coil and new plug? I had it up and running and I shut it off. Now it won't fire at all. This is getting to be frustrating. I have cleaned the carb and found that one jet had an obstruction. I cleand the orifices with a torch tip cleaner. Thats all I have done and now I can't seem to make it purr again. HELP!

phil · 04-10-2009, 07:32 PM

the factory plugs on most are a brand called torch they are so proud of them they dont have the brand on them go to a ngk or better a ngk IR once a plug gets wet its almost always forever gone i think youll be fine once you get the new plug and run it some

red85 · 04-10-2009, 08:40 PM

What about the carb set? I bottomed out the mixture screw and turned it out 1/4 turn. Is this too lean or should I leave it be?

Weldangrind · 04-10-2009, 08:43 PM

Sounds a little lean; try 1.5 turns out to be safe.

warrior91 · 04-10-2009, 11:25 PM

Quote:

Originally Posted by red85

I agree. What do I do to keep it from fouling? The mixture screw on the carb is about 1/4 turn out. Do I need to look for another coil and new plug? I had it up and running and I shut it off. Now it won't fire at all. This is getting to be frustrating. I have cleaned the carb and found that one jet had an obstruction. I cleand the orifices with a torch tip cleaner. Thats all I have done and now I can't seem to make it purr again. HELP!

You might just have rejetted your bike...not a biggie but now try to drop your needle a notch and give it another go with a new ngk plug.

warrior91 · 04-10-2009, 11:26 PM

Quote:

Originally Posted by Weldangrind

Sounds a little lean; try 1.5 turns out to be safe.

:idea: 8)

The kill switch is a place to look as well...it must be looped , not disconected, if your bike is also equipped with a keyswitch.
I have found the connections are light wire and poorly crimped.
With your bar removal project you might have pulled a connection apart without knowing...

red85 · 04-11-2009, 02:07 PM

Quote:

Originally Posted by warrior91

Quote:

Originally Posted by red85

I agree. What do I do to keep it from fouling? The mixture screw on the carb is about 1/4 turn out. Do I need to look for another coil and new plug? I had it up and running and I shut it off. Now it won't fire at all. This is getting to be frustrating. I have cleaned the carb and found that one jet had an obstruction. I cleand the orifices with a torch tip cleaner. Thats all I have done and now I can't seem to make it purr again. HELP!

You might just have rejetted your bike...not a biggie but now try to drop your needle a notch and give it another go with a new ngk plug.

Got her up and running. Definitely running rich though. A new plug made all the difference. I definitely unwittingly rejetted it. Whoops. Rookie mistake. I ordered a new Mikuni for it today. $40 shipped. Good deal as far as I'm concerned.

red85 · 04-11-2009, 08:12 PM

How do I go about dropping the needle a notch?
*EDIT* I got it figured out without a problem. It was very easy. I just unscrewed the top of the carb, removed the slide, removed the "hairpin" and pulled the needle. Then I removed the e-clip and moved it up 2 notches.

^the reason I wrote this out was so anyone who's never done this before would have a clue and not be scared to do it on their own.

The bike is running great now and I'm very proud that I was able to do it myself (with some good help from China Riders)

Thanks

Phil

FLASHLIGHTBOY · 05-12-2009, 01:53 AM

HELLO , did you move the clip up 2 notches because it was over fueling?? and now it is beter.. not over fueling... right??

red85 · 05-12-2009, 08:38 PM

It made a difference, but I ended up swapping out the carb for a Mikuni 25mm. That carb really makes the bike run well.

04-09-2009, 07:51 PM	#1
red85 Join Date: Mar 2009 Posts: 63	My 100CC Lifan won't start I had to remove the handlebars in my Lifan GY 100and now it won't start. I checked the plug and it's wet. I sprayed it down with brake clean and that didn't do a thing. I just don't think I have any spark, but my spark tester is in my box at work. Any suggestios about what I might try!
	0

04-09-2009, 08:07 PM	#2
phil Join Date: Jun 2008 Location: wise va Posts: 636	look at all solder spots on the controls mounted to the handlebars i had a problem with my lf110 i reccomend taking ALL the electrical connectors loose filling them with dielectric or litihum grease and plug them back and use a zip tie to hold them together and you have saved yourself more problems than you realize :wink: __________________ halls auto l coolster, modcycles, yanmar & zongshen, dealer fired roketa,lifan and jet moto and apollo quit me who's next
	0

04-10-2009, 06:55 PM	#4
phil Join Date: Jun 2008 Location: wise va Posts: 636	we need to know if its getting fire to the plug but if it fired once and wont again my guess is a fouled plug __________________ halls auto l coolster, modcycles, yanmar & zongshen, dealer fired roketa,lifan and jet moto and apollo quit me who's next
	0

04-10-2009, 07:32 PM	#6
phil Join Date: Jun 2008 Location: wise va Posts: 636	the factory plugs on most are a brand called torch they are so proud of them they dont have the brand on them go to a ngk or better a ngk IR once a plug gets wet its almost always forever gone i think youll be fine once you get the new plug and run it some __________________ halls auto l coolster, modcycles, yanmar & zongshen, dealer fired roketa,lifan and jet moto and apollo quit me who's next
	0

04-10-2009, 08:43 PM	#8
Weldangrind Join Date: Mar 2009 Location: Sardis, BC, Canada Posts: 25,977	Sounds a little lean; try 1.5 turns out to be safe. __________________ Weldangrind "I figure I'm well-prepared for coping with a bike that comes from the factory with unresolved issues and that rewards the self-reliant owner." - Buccaneer
	0

04-10-2009, 04:58 PM	#3
red85 Join Date: Mar 2009 Posts: 63	It's still not starting. I have been playing around with it this aft and it actually fired up one time. Now it seems that it's over fuelling and drowning my plug. I'm really at a loss here. I'm a car mechanic not a bike mechanic. I started this whole ordeal when I went to replace a broken throttle control. Since that oint it's all gone sounth on me. Any ideas?
	0

04-10-2009, 07:17 PM	#5
red85 Join Date: Mar 2009 Posts: 63	I agree. What do I do to keep it from fouling? The mixture screw on the carb is about 1/4 turn out. Do I need to look for another coil and new plug? I had it up and running and I shut it off. Now it won't fire at all. This is getting to be frustrating. I have cleaned the carb and found that one jet had an obstruction. I cleand the orifices with a torch tip cleaner. Thats all I have done and now I can't seem to make it purr again. HELP!
	0

04-10-2009, 08:40 PM	#7
red85 Join Date: Mar 2009 Posts: 63	What about the carb set? I bottomed out the mixture screw and turned it out 1/4 turn. Is this too lean or should I leave it be?
	0

04-11-2009, 08:12 PM	#12
red85 Join Date: Mar 2009 Posts: 63	How do I go about dropping the needle a notch? EDIT I got it figured out without a problem. It was very easy. I just unscrewed the top of the carb, removed the slide, removed the "hairpin" and pulled the needle. Then I removed the e-clip and moved it up 2 notches. ^the reason I wrote this out was so anyone who's never done this before would have a clue and not be scared to do it on their own. The bike is running great now and I'm very proud that I was able to do it myself (with some good help from China Riders) Thanks Phil
	0

05-12-2009, 01:53 AM	#13
FLASHLIGHTBOY Join Date: May 2009 Location: SASKATOON Posts: 1,161	HELLO , did you move the clip up 2 notches because it was over fueling?? and now it is beter.. not over fueling... right??
	0

05-12-2009, 08:38 PM	#14
red85 Join Date: Mar 2009 Posts: 63	It made a difference, but I ended up swapping out the carb for a Mikuni 25mm. That carb really makes the bike run well.
	0