Hello, been searching on this site for similar problems like i have but I didnt find anything.
My 2 year old sons lt50 wont start after I been trying to repair it for weeks, I am about to give up but I give it a last shot on this forum.
We bought it last year from our neighbour and the quad have been going great until a few weeks ago.
The spark was almost unable to see from the begining and the quad would not start, after i bought a new sparkplug it didnt start anyway and the spark totaly disapeard.
I have measure the resistant on the ignition coil flywheel and also the coil on the frame on a exactly same quad, and i get the same values on mine, but no spark at all.
I have also checked both the killer switches and they seems to work just fine.Any ideas people? my kid is so ready to start riding

cheers from sweden

 

Bypass all the kill wires, if I remember rightly all you need to do is connect the wire from magneto directly to the coil via a bullet connector. You never seem to get a good spark from an LT50 anyway, but see if that works. If it doesn't, try another new plug. Check if you are getting any AC volts from the magneto wire when you pull the starter, if you are not, try a new magneto coil.