Hi everyone, I've been working on a 02 trx250tm, changed piston, head, stator, pick up coil, ignition coil, spark plug and cdi, but for some strange reason it sparks one time everytime I press the start button, then no spark at all. I checked charge coming out of pick up coil directly from the connector and it's working perfectly but when I check at cdi it seems to give no signal at all. Also when I test the two wires going to ignition coil they both are giving me a ground signal, I thought one was a positive charge, so I went thru the wires looking for a broken connection but everything seems to be good. The neutral light is coming on but I can't figure out what can be the issue. I haven't replaced the rectifier yet, not sure if it has anything to do with it tho....anyone can help me???