Lifan 140 Stator Problem

[Jakewhittle949]

So my chain popped off and hit the magnet sensor that the flywheel spins past and busted the sensor. After taking sensor apart I reassembled everything with but didn’t readjust the clearance of the sensor and flywheel. I still didn’t get spark so I ordered a new Amazon Lifan 140 stator. Last night I installed the new stator, the clearance was really close but didn’t appear to be touching. After reassembly still no spark . Does anyone know the spec so that I can bend the magnetic stator sensor to the correct position with a feeler gauge? Or do you think I may have a secondary issue? I have checked my connections and everything looks good…

 

[miniriders]

Hi, just curious, is this the same bike from another thread?

 

[Ou812oku]

0.08-0.20

 

[miniriders]

So my chain popped off and hit the magnet sensor that the flywheel spins past and busted the sensor. After taking sensor apart I reassembled everything with but didn’t readjust the clearance of the sensor and flywheel. I still didn’t get spark so I ordered a new Amazon Lifan 140 stator. Last night I installed the new stator, the clearance was really close but didn’t appear to be touching. After reassembly still no spark . Does anyone know the spec so that I can bend the magnetic stator sensor to the correct position with a feeler gauge? Or do you think I may have a secondary issue? I have checked my connections and everything looks good…

Hi there, any updates?

 

[vicsrc]

So my chain popped off and hit the magnet sensor that the flywheel spins past and busted the sensor. After taking sensor apart I reassembled everything with but didn’t readjust the clearance of the sensor and flywheel. I still didn’t get spark so I ordered a new Amazon Lifan 140 stator. Last night I installed the new stator, the clearance was really close but didn’t appear to be touching. After reassembly still no spark . Does anyone know the spec so that I can bend the magnetic stator sensor to the correct position with a feeler gauge? Or do you think I may have a secondary issue? I have checked my connections and everything looks good…

Please let me know if you solve this problem
I have a lifan 250cc vtwin with no spark

 

[Jakewhittle949]

Please let me know if you solve this problem
I have a lifan 250cc vtwin with no spark

I ended up ordering a new stator and gapped the flywheel to sensor.

 

[vicsrc]

I replaced the stator and sensor and cdi box and coils and still no spark

 

[Jakewhittle949]

Do you have a multimeter to test where you have voltage?

 

[vicsrc]

Yes I do and it all seems to be fine but without a similar bike I cant be sure

 

[Jakewhittle949]

Probably a dumb question but have you checked the spark plug? I would search for a wiring diagram an test the voltage at each wire. You may be able to buy a whole new harness, but I doubt the lifan 250 is anything like a 140. Thats a vertical motor mine is horizontal

 

[vicsrc]

The closest diagram I can find is for a Yamaha 250 Virago
The plugs are new also
This bike has been sitting in the desert since 2008 It only has 700 miles on itDont know why someone tore it apart but they really messed it up
Im going out for a while will reply later

 

[vicsrc]

I just bought a harness and electronics on flea bay for a virago im going to gut it and start over

 

[vicsrc]

Thanks for repling Ive been trying to get a response for about a month

 

[Jakewhittle949]

Thanks for repling Ive been trying to get a response for about a month

No problem! These Chinese bikes can be a pain!

 

[vicsrc]

Change that to a Kawasaki harness and hardware from a 250 ATV the spark system should work no matter what
Wish me luck

 

[vicsrc]

I did notice that there is no way to adjust the sensor gap since the stator is in in the outer case and has to be on the bike and you cant get to them with the case in position
I have checked the output voltage from the sensor as I spin the engine and it is putting out voltage
the stator is putting out voltage for the battery
this is what things looked like when I got the bike
There are 10 splices in a 5 inch section of the harness

 

[Bswizzy830]

So my chain popped off and hit the magnet sensor that the flywheel spins past and busted the sensor. After taking sensor apart I reassembled everything with but didn’t readjust the clearance of the sensor and flywheel. I still didn’t get spark so I ordered a new Amazon Lifan 140 stator. Last night I installed the new stator, the clearance was really close but didn’t appear to be touching. After reassembly still no spark . Does anyone know the spec so that I can bend the magnetic stator sensor to the correct position with a feeler gauge? Or do you think I may have a secondary issue? I have checked my connections and everything looks good…

I have rebuilt and worked on many of these horizontal motors and have a lifan 140cc on my honda ct every single time I space the sensor from the flywheel I use a business card lol a small engine mechanic taught me that years ago and between these mini motors, lawn mowers, weed wackers and chainsaws it works every time.. let me know if you're still having an issue and I'll walk you through your troubleshooting steps

 

[vicsrc]

How do you gap the sensor when it is mounted in the outer case with the stator and the flywheel is in the inner case and there is no way to to see/feel/ or touch the sensor??