Hello my name is mike and I have been hiding a lifan problem

TeamCheap · 07-02-2007, 08:47 PM

(Lifan support group)

I have had a slight problem with my lifan lately that has put it out of service until today.(I feel ashamed- :oops

It all started a couple of weeks ago while out riding, we were putting around the sub and my bike stalled I checked the plug, it was very hot (the plug) and dry but had a weak spark.I bled a little fuel out of the carb bleeder screw-Hmm fuel there-good-but will not start.
I just pushed it home it was just a block from my house and lightly raining.

A few days later with a new plug and a full fuel tank we gave it another try and it did about the same thing, run for a while then sputter and stall and not start.
After sitting a while it would start so I'm thinking maybe something is heating up and shutting it down (electrical) but I still go ahead and take the carb off and look for gunk in there and there is a very little amount of goo and a few small particles so I clean it all up.

We go for another ride and still the same thing, it runs great for a little while (few hundred feet to a few miles-always different distance) and sputters a bit then stalls and wont start for a few minutes (20 minutes or so)

So I decide go at it today.
With all the extra electrical components I have around here I start swapping out parts
(coil,CDI) to see if it could be an electrical part.NOPE.

So I do a backstep and start looking for the simple thing I overlooked long ago and found an odd problem.
All along I have stupidily overlooked the most important clue from the spark plug.

Anyone care to guess?
(clue-I had almost found the problem right from the start BUT....)

Jeremy · 07-02-2007, 08:56 PM

could it be the plug wire?

jkomp316 · 07-02-2007, 08:58 PM

my car did the same thing when the intake was leaking?

TeamCheap · 07-02-2007, 09:04 PM

Nope not the plug wire and I even tried my spare coil-W/wire on it to no effect.

Not an intake leak, but it was running lean

AZ200cc · 07-02-2007, 09:10 PM

A rat had moved into the exhaust pipe? Kidding
I am stumped...What was it? what was it? I'm curious now.

TeamCheap · 07-02-2007, 09:14 PM

yeah I was stumped to and the problem will blow your mind, very simple and easy to overlook.

I almost had the first look I took if only I had let.........................

AZ200cc · 07-02-2007, 09:15 PM

Was the choke stuck?

TeamCheap · 07-02-2007, 09:18 PM

nope not the choke it works fine and in fact the carb was perfect after cleaning out a little bit of junk but that wasnt the problem.

TeamCheap · 07-02-2007, 09:20 PM

So after today I had ruled out any electrical problem so that leaves FUEL.

AZ200cc · 07-02-2007, 09:26 PM

Alright, My last try A bad fuel line?

TeamCheap · 07-02-2007, 09:31 PM

nope fuel line is new I ditched the cheap black stuff when I did the engine swap.

Heres a big hint: the carb bleeder screw clued me into the problem.But the problem has nothing to do with the CARB itself.

madmaximum · 07-02-2007, 09:35 PM

Intake boot?

TeamCheap · 07-02-2007, 09:37 PM

nope I thought about that and looked at it very close but its good.

madmaximum · 07-02-2007, 09:40 PM

ok, lean, not carb......you're acting like it's something simple......vent hose??

TeamCheap · 07-02-2007, 09:44 PM

So heres what we know.

The tank is full.
The carb is clean and working perfect.
The electrical is fine and the plug is NEW.
There is good compression-I did not take a reading but it is good (new engine -apparently no damage done to it compression wise-and it has run well before this problem started)

The clue to whats going on is the carb bleeder screw.

07-02-2007, 08:47 PM	#1
TeamCheap Join Date: Jun 2006 Location: directly under the earths sun............NOW Posts: 2,302	Hello my name is mike and I have been hiding a lifan problem (Lifan support group) I have had a slight problem with my lifan lately that has put it out of service until today.(I feel ashamed- :oops It all started a couple of weeks ago while out riding, we were putting around the sub and my bike stalled I checked the plug, it was very hot (the plug) and dry but had a weak spark.I bled a little fuel out of the carb bleeder screw-Hmm fuel there-good-but will not start. I just pushed it home it was just a block from my house and lightly raining. A few days later with a new plug and a full fuel tank we gave it another try and it did about the same thing, run for a while then sputter and stall and not start. After sitting a while it would start so I'm thinking maybe something is heating up and shutting it down (electrical) but I still go ahead and take the carb off and look for gunk in there and there is a very little amount of goo and a few small particles so I clean it all up. We go for another ride and still the same thing, it runs great for a little while (few hundred feet to a few miles-always different distance) and sputters a bit then stalls and wont start for a few minutes (20 minutes or so) So I decide go at it today. With all the extra electrical components I have around here I start swapping out parts (coil,CDI) to see if it could be an electrical part.NOPE. So I do a backstep and start looking for the simple thing I overlooked long ago and found an odd problem. All along I have stupidily overlooked the most important clue from the spark plug. Anyone care to guess? (clue-I had almost found the problem right from the start BUT....)
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07-02-2007, 09:10 PM	#5
AZ200cc Join Date: Apr 2007 Location: Show Low Arizona Posts: 2,889	A rat had moved into the exhaust pipe? Kidding I am stumped...What was it? what was it? I'm curious now. __________________ <br />2001 Suzuki DR200SE<br />1997 Suzuki RM250 YIKES<br />1995 Yamaha Breeze 125 daughters<br />1991 Honda XR80r Restored<br />maybe a 2003 Yamaha TTR90
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07-02-2007, 09:15 PM	#7
AZ200cc Join Date: Apr 2007 Location: Show Low Arizona Posts: 2,889	Was the choke stuck? __________________ <br />2001 Suzuki DR200SE<br />1997 Suzuki RM250 YIKES<br />1995 Yamaha Breeze 125 daughters<br />1991 Honda XR80r Restored<br />maybe a 2003 Yamaha TTR90
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07-02-2007, 09:26 PM	#10
AZ200cc Join Date: Apr 2007 Location: Show Low Arizona Posts: 2,889	Alright, My last try A bad fuel line? __________________ <br />2001 Suzuki DR200SE<br />1997 Suzuki RM250 YIKES<br />1995 Yamaha Breeze 125 daughters<br />1991 Honda XR80r Restored<br />maybe a 2003 Yamaha TTR90
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07-02-2007, 09:35 PM	#12
madmaximum Join Date: Jan 2007 Location: Central PA Posts: 284	Intake boot? __________________ 2005 RSX-200E 2004 Suzuki Eiger 1999 Arctic Cat 250 1977 Kawasaki KH400, aka Green Ripper
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07-02-2007, 08:56 PM	#2
Jeremy Join Date: Jun 2007 Location: Williams Oregon Posts: 21	could it be the plug wire?
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07-02-2007, 08:58 PM	#3
jkomp316 Join Date: May 2007 Location: Milwaukee, WI Posts: 145	my car did the same thing when the intake was leaking?
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07-02-2007, 09:04 PM	#4
TeamCheap Join Date: Jun 2006 Location: directly under the earths sun............NOW Posts: 2,302	Nope not the plug wire and I even tried my spare coil-W/wire on it to no effect. Not an intake leak, but it was running lean
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07-02-2007, 09:14 PM	#6
TeamCheap Join Date: Jun 2006 Location: directly under the earths sun............NOW Posts: 2,302	yeah I was stumped to and the problem will blow your mind, very simple and easy to overlook. I almost had the first look I took if only I had let.........................
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07-02-2007, 09:18 PM	#8
TeamCheap Join Date: Jun 2006 Location: directly under the earths sun............NOW Posts: 2,302	nope not the choke it works fine and in fact the carb was perfect after cleaning out a little bit of junk but that wasnt the problem.
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07-02-2007, 09:20 PM	#9
TeamCheap Join Date: Jun 2006 Location: directly under the earths sun............NOW Posts: 2,302	So after today I had ruled out any electrical problem so that leaves FUEL.
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07-02-2007, 09:31 PM	#11
TeamCheap Join Date: Jun 2006 Location: directly under the earths sun............NOW Posts: 2,302	nope fuel line is new I ditched the cheap black stuff when I did the engine swap. Heres a big hint: the carb bleeder screw clued me into the problem.But the problem has nothing to do with the CARB itself.
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07-02-2007, 09:37 PM	#13
TeamCheap Join Date: Jun 2006 Location: directly under the earths sun............NOW Posts: 2,302	nope I thought about that and looked at it very close but its good.
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07-02-2007, 09:40 PM	#14
madmaximum Join Date: Jan 2007 Location: Central PA Posts: 284	ok, lean, not carb......you're acting like it's something simple......vent hose?? __________________ 2005 RSX-200E 2004 Suzuki Eiger 1999 Arctic Cat 250 1977 Kawasaki KH400, aka Green Ripper
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07-02-2007, 09:44 PM	#15
TeamCheap Join Date: Jun 2006 Location: directly under the earths sun............NOW Posts: 2,302	So heres what we know. The tank is full. The carb is clean and working perfect. The electrical is fine and the plug is NEW. There is good compression-I did not take a reading but it is good (new engine -apparently no damage done to it compression wise-and it has run well before this problem started) The clue to whats going on is the carb bleeder screw.
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