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my bms v9 evo (gy6 150cc) will not start and we have done every test suggested apart from going into the timing again which appears to be in the right place but I will concede that it could be a tooth off. This all started when I replaced my my stock Chinese valves for good steal ones and put it back on the bike. It appears that I have set everything to the marks... The holes that line up parallel to the edge look very good but could be a millimeter off in their lineup with the edge of the casing. Don't know if that is a big deal. My scooter will absolutely not start even with spraying some carb cleaner through the air intake of the carb. absolutely no response to this... none. I can't get any form of firing to go. I have spark and everything. could I have lined up the timing on the wrong stroke making the spark to fire on the exhaust stroke and that being the reason for no response? Again, every test suggested besides going back to the timing has been tried... I have received great feedback on this board and am wondering what you guys have to say about this. Appreciate it!

no its not doin its thing and we have sprayed 89 octane will jumping solenoid, by passing carb and we can't even get a sloppy fire

I have put my scooter back together after swapping out the valves of my gy6. I have found that the spark I am getting when I pull the plug comes as one bright spark and then a constant flickering of very small arcs. Nothing that would indicate any form of correlation with a stroke. I turn the starter over by bipassing the solenoid with a screwdriver so it turns and I get spark but as I said it shows a good spark and then a steady floww of little tiny sparks as I turn the starter. any help would be very appreciated.

when replacing stock air box for a cone filter upgrade there are so many vac lines that no longer have anything to connect to. I take it I don't need them now... but what do I do with them and why is it ok to not use them anymore? this may be a very basic question but I don't know what to do with all the lines that came out of the old air box.

This must be serious.
When I jump the solenoid I am getting voltage up the green ground wire from the stator.
Several times now I have found the clear plastic sheath melting where this green wire from the stator connects to the corresponding green ground on the harness.

The only thing I can think of that may have caused a screw up in the wiring from the stator is when I was setting the timing belt after replacing the valves and accidentally rotated the stator backwards when trying to set top dead center. Would this have damaged wiring? I caught my wrong rotation and went on to set TDC by rotating the correct direction. I set timing very well in the end but made this rotation mistake at first.

I would check what is happening in the wiring to from the stator but I am not yet sure how to get that bolt off (how to stop the stator from turning while I turn the bolt loose).

Any commentary would be greatly appreciated. Would this have screwed up the grounding to other circuitry including the connection from the start button to the solenoid?

I'd already tested the solenoid wire with both my light tester and my multimeter when I posted this inquiry...

At this point it looks like this is not any kind of typically diagnosed problem. There must just be some random loose wire somewhere that people would never expect. I guess I'll just have to tear everything down to see every single connection and rewire it myself if needed. I was hoping to avoid that...