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I am questioning the 100 volts to the trigger circuit, if when the bullet connectors were reversed, there was nothing happening, everything was dead, the motor would not even turn over, so there could not be any voltage going to the trigger circuit.so I am thinking the cdi may still be good.

I bought a new one today and I still have no spark, motor turns over fine and I measured the voltages on the cdi and they seam to be ok. I am going to put the old cdi back in and recheck everything again. the new cdi was much longer than the original so it may not be the right one.

right now, I really don't know for sure.

another question:
I have a inductive pick-up timing light, connect power to batt, clip the inductive pick-up to the spark plug wire, I think I should have it light up with the spark plug firing, well I have no indication of any spark.

the hose you asked where it went, I forgot to connect it to the port on the output of the air cleaner or the intake.\the other end goes to the device that looks like it was never hooked up on the other side of the canister.

a while back I posted about engine stopping because of no oil, well today I got a new engine and pulled the old one out, then installed the new one, all went well until I tried to mount the rear wheel.
well there was no axle shaft exposed to install the nut, it was not the same size as the old one. so I pulled out the old axle and install it in the new engine, and it all fit great, guess I need to call scrappydog to find out why it has the wrong axle. it was over 2 " shorter than the original one.
the other difference is all the vacuum lines, the old engine has the pac, and the new one does not.
so I may be posting on here for some help on how to change the vacuum lines.
this was supposed to be a easy bolt up job, but ended being a major task.

blew the engine on my gy6 150 scoot.

scrappy dog has a new one complete for $350, my question is are all 157qmj engines the same.
I see where some have different stators , different number of poles.
if I was to buy the engine from scrappy dog, should it bolt up and all connections be the same ?

on the steering shaft, where the handle-bars connect to the front wheel shaft, there is a bolt that was loose causing some play in the steering, tightened it up and was good for a while, now it has some play in it again, is this bolt something special or do I just tighten it up again ?