Topic: Question about coils

[m00ntan]

I hooked up coils that came in a box of stuff I bought from ebay.  The tips of the wires are good.  But two of the wires spin around free inside the coils.

Is this OK or should I trash these coils?

[Gordon]

What kind of coils?  Do they have molded in wires or are they removable? 

[m00ntan]

They are the right coils for the CB550 K1 with the non-detachable wires.  But the wires spin around free inside.

I have a multimeter with no instructions and no idea how to use it.

 

[TwoTired]

The wires should not spin in the coil mounts.  This puts stress on the all important conductive wire inside, and also lets water in to shunt away the  electricity.

If the internal wire core is still intact, you may still be able seal the wires to the coil housing with thick super glue, tar, or other such insulative adhesive.  Be sure to place the wire in the proper orientation before doing so.  The old leads can get very brittle, and cracks or splits anywhere along their length is a reliability problem.

To see if the core is still intact, set your Meter to ohms and check for continuity between HT core center to the other HT core center.  If you get continuity, the internal wire is not broken and shows base functionality.


Cheers,

[m00ntan]

Got it.

Ohms are the upside down horseshoe and HT leads are coil to spark plug wires.

Nope, no continuity, but the spark jumped enough to let it run like it wasn't natural.

Off to find some CB900 coils and extra points.

Thanks.

[TwoTired]

Remember, that there is more than enough voltage to jump two spark plug gaps.  A broken HT (High Tension) wire simply adds another spark gap.  If it is small enough, you can still get spark at the plugs.

But, for long term reliability, spark gap erosion and immediate vicinity heating should be confine to only the spark plug gaps.

Cheers,