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Louie
Louie, Technician
Category: Motorcycle
Satisfied Customers: 12577
Experience:  25+ yrs. experience
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Weak spark replaced plug,coil,switch,cdi, stator.no blue

Customer Question

weak spark replaced plug,coil,switch,cdi, stator.no blue spark 88 quadsport lt230s
Submitted: 1 year ago.
Category: Motorcycle
Expert:  Louie replied 1 year ago.

Hi and welcome to JustAnswer,

Thank you for the question and your patience. Should you still need assistance for information purposes only...

Initially, bear with us; re-confirm and post back with the wire colors of the CDI or perhaps better yet, clear pictures of the old and new CDIs. Please click HERE.

Still, proposed preliminary tries (if have not been done):

  • • check, clean tighten all harness ground to engine and to frame connections. Strongly consider hardwiring a second ground line CDI. frame, engine, ignition coil;
  • • temporarily disconnect the CDI's kill wire.

All other checks would be with the use of a multi-meter.

Please post back results / observations of the above once tried.

Customer: replied 1 year ago.
your idea did not work
Expert:  Louie replied 1 year ago.

As above posted, "...preliminary tries..."

And the pictures and/or wire colors please?

Customer: replied 1 year ago.
pick up coil - blue & green wires, power coil - brown & pink wires, ignition coil - white blue tracer & black white tracer, ground - black white tracer.
Expert:  Louie replied 1 year ago.

When attempting to start, determine the:

  • • low pulsating voltage output of the pickup coil;
  • • high pulsating voltage of the capacitor charging coil.

Thanks.

Customer: replied 1 year ago.
they are both new and with in the specs per suzuki lt230s factory service manual,pickup coil 111.8 range (100-200) ,primary coil 228 range (150-350)
Expert:  Louie replied 1 year ago.

Thanks.

But that would be the passive check; i.e. the resistance in Ω.

As above posted, check for the pulsating voltages please.

Customer: replied 1 year ago.
how do I check the pulsating voltages?
Expert:  Louie replied 1 year ago.

When attempting to start, determine the:

  • low pulsating voltage output of the pickup coil - measure the voltage between the pick up coil's blue & green wires;
  • high pulsating voltage of the capacitor charging coil - measure the voltage between the power coil's brown & pink wires.
Customer: replied 1 year ago.
blue&green-fluctuates 2,4,6,8 brown & pink - fluctuates -1,-2,-3
Expert:  Louie replied 1 year ago.

The pick up coil's blue & green wires expectedly would produce very low voltage 1V or even less; not 2,4,6,8.

On the other hand, the power coil's brown & pink wires should be able to produce very high voltage even more than 50V; not just less; not just -1,-2,-3.

Please post back with clear picture(s) of the stator and the pickup coil.

Thanks.

Customer: replied 1 year ago.
to do that i would have to drain the oil and take the cover off the engine again.why do you need to see pictures of the stator and pickup coil? did I need to use a special kind of meter to test the voltage other than a multimeter. i used a craftsman multimeter and a fluke meter,when I tested the power coil with the fluke I got OL reading.
Expert:  Louie replied 1 year ago.

If it was from an online seller, perhaps they have a picture on their site?

The prescribed test instrument is a peak voltage meter. If not available, then an analog multi-meter. If a digital multi-meter is used, then the pulsation may not be 'that' apparent and the voltage reading only relative.

A possibility to consider / rule out is that the wires for pickup coil and capacitor charging coil (power coil) may have been mixed up.

Another is grounded wire from either coil.

...hence a picture would help.

The previous issue was "...weak spark..."

Then when the "... plug,coil,switch,cdi, stator..." were replaced, the current condition is "...no blue spark..."

If the old "... plug,coil,switch,cdi..." were installed back and yet/still "...no blue spark...", then the stator would be the only suspect left.