Gy6 Sudden no spark  By  jjoshua20213 (Read 7,363 times)

So yesterday morning, I made a food run in the rain. ( have been doing a lot of snow riding too) And in less than 3 miles the bike starts misfiring and backfiring horribly and loosing power. That lasted for about 20 secs. Even after I notice a slight power loss. A half mile later it starts back again and this time I could tell it lost all spark. (Like hitting the kill switch) No amount of throttle or anything would make it fire again. Ever since then the bike has no spark. I've torn down the top end out of suspicion of a warped valve and because i'm replacing the piston and no signs of problems, compression sounds good. I know its getting gas because starter fluid made no difference. Just random and sudden no spark.


So far i've ruled out the CDI, and the coil/wire by spare parts. All lead point at the stator or pick up coil. The bike did act like the timing was off right before it died (Extraneous popping/ back firing, misfiring) so the pickup-coil is under suspicion. My battery was fine.



What caused this SUDDEN problem?

Can the pick-up coil die out that fast?

I have a running parts bike I could get a spare engine from but an engine swap by myself seems doable but difficult and is my last resort.

I could also get just the stator off of it but if that does not fix the problem I just did work to create more for myself.

Also while removing the flywheel I managed to crack the case around where the stator sits. Its not bad just cracked. The whole area is weak and can be easily broken with medium to low force.. Don't remember it being like that before...