Bike running without ignition trigger coil? By jjoshua20213 (Read 1,574 times)

[jjoshua20213]

I was checking wires to the coil for damege and unpluged the positive one and the bike still ran, and better untill it got to a high rpm then it severely misfired down to about idle then tried again.



I dont plan on using it without it, but i'm curious of how the stuff works.

[Alleyoop]

No that is IMPOSSIBLE you may have pulled the ground and the coil may be grounded to the frame so it was still making some kind of ground.
Alleyoop

[jjoshua20213]

I don't know then. I followed the wires from the stator. One is a bundle of wires in a plug that powers all lights. The other two are a black and red wire. I unplugged the red wire. instantly the bike stopped misfiring and revved up. then when it got to a curtain rpm is misfires horribly. Then I plug the red cables back together and instantly it stops misfiring as much as without it plugged in.

[Alleyoop]

The coil is FED by the CDI not the STATOR. The Stator feeds the CDI the Pick up Coil feeds the CDI to tell it when to fire and one wire FROM THE CDI GOES TO THE COIL. So your a little confused on the wiring.

What is your problem with the scoot anyway?
Alleyoop

[jjoshua20213]

I must be confused on the wiring. I wonder what that wire goes too that drastically changes the way the engine fires. But the engine is misfiring progressively worse. I tried to clean the trigger coil by the stator and it made it worse. Once I get in high rpms it misfires to the point where it acts as if i'm hitting the kill switch for 3 secs. I know its something gone bad because I didnt change anything before it started.

[Alleyoop]

If cleaning the PICKUP COIL made it worse THEN you need a NEW PICKUP COIL.
Alleyoop

[jjoshua20213]

lol, I figured as much. I was just trying to "milk" the old one untill payday.

[jjoshua20213]

The ride to work today was horrible, barely 35 and it died. Ride home same thing. I checked the wires on the trigger coil and made sure I put it back right. Same results. Then I removed it from the fly wheel and started the engine. It ran a little better but still severe misfiring in my power rpm. So I unplugged the red wire again and went on a test ride. It rode almost like it used to. I guess my variator setup wont allow it to reach that high rpm where it misfires badly. But then I plug it in and it misfires through every rpm, and stuggles to get higher. I have to pulse revv it to rarely get it high and steady. But then I unplug that wire and it works almost fine. On the kick stand it gets to a high rpm stays then misfires badly...... My qustion is what is this wire too? its red and the only other red and travels to the magneto area. The only red wire I see is on the trigger pickup coil. There is a black wire right next to the red. When I plug the red up and unplug that the engine dies immediately. I know I need a new coil, but i'm curious as to what that wire is for and how is it affecting the spark.

[Bashan]

These diagrams are in the Scooter Doc Library along with a boatload of other information:

This is a clear diagram of the interconnection between the stator, coil and CDI from our good friend and member Sprocket:

And this is how it plugs into the CDI:

The R/B wire is off of a dedicated stator coil that provides AC voltage to the CDI to power the ignition coil. The yellow provides AC current for many of the lights. The white provides juice for the charging circuit. The pickup (or trigger coil) initiates the spark by telling the CDI to send energy to the ignition coil. If you have a DC system the R/B is replaced by a black wire from the ignition switch and there is no killwire. Alley is right, these things function in only one way. You have things mixed up somehow.