Author Topic: Setting timing. Sparks in 2-3 point normal??  (Read 1152 times)

0 Members and 1 Guest are viewing this topic.

Offline evopgt

  • Enthusiast
  • **
  • Posts: 130
Setting timing. Sparks in 2-3 point normal??
« on: June 17, 2017, 08:27:42 PM »
I did my timing yesterday on my 78 cb550.. as I was rotating the crank with the 23mm nut I kept seeing sparks in the 2-3 point. Is that normal?

Offline BomberMann650

  • Holy Cow! I'm a
  • Really Old Timer ...
  • *******
  • Posts: 6,442
  • Dr. Bovinestein iBa#80333
Re: Setting timing. Sparks in 2-3 point normal??
« Reply #1 on: June 17, 2017, 08:39:26 PM »
Big sparks are a nope.

Offline evopgt

  • Enthusiast
  • **
  • Posts: 130
Re: Setting timing. Sparks in 2-3 point normal??
« Reply #2 on: June 17, 2017, 08:49:01 PM »
Does it mean points need replaced??

Offline evopgt

  • Enthusiast
  • **
  • Posts: 130
Re: Setting timing. Sparks in 2-3 point normal??
« Reply #3 on: June 17, 2017, 08:53:39 PM »
It wasn't sparking between the gaps, it was in the center of the point. Like where it pivots.
« Last Edit: June 17, 2017, 09:02:22 PM by evopgt »

Offline Jimray23

  • Hot Shot
  • ***
  • Posts: 306
    • none
Re: Setting timing. Sparks in 2-3 point normal??
« Reply #4 on: June 17, 2017, 09:03:19 PM »
 Are you talking about the little fiber board that contacts the cam on the timing plate? Sounds like its shorting out. but seems to me like it wouldn't run very good, if at all, if it was shorting out there.

--------------------------------------------------
Jim
I really don't see why people ask for advice if their not going to take the advice given.


Offline evopgt

  • Enthusiast
  • **
  • Posts: 130
Re: Setting timing. Sparks in 2-3 point normal??
« Reply #5 on: June 17, 2017, 09:45:35 PM »
Right here, circled it in orange

Offline TwoTired

  • Really Old Timer ...
  • *******
  • Posts: 21,802
Re: Setting timing. Sparks in 2-3 point normal??
« Reply #6 on: June 17, 2017, 09:58:14 PM »
The pivot point is a ground path and current flows through it.  But, it should have enough continuity to not spark.  I suggest cleaning the pivot post and renew the grease on it.
Lloyd... (SOHC4 #11 Original Mail List)
72 500, 74 550, 75 550K, 75 550F, 76 550F, 77 550F X2, 78 550K, 77 750F X2, 78 750F, 79CX500, 85 700SC, GL1100

Those that learn from history are doomed to repeat it by those that don't learn from history.

Offline evopgt

  • Enthusiast
  • **
  • Posts: 130
Re: Setting timing. Sparks in 2-3 point normal??
« Reply #7 on: June 17, 2017, 10:14:26 PM »
What kind of grease??

Offline TwoTired

  • Really Old Timer ...
  • *******
  • Posts: 21,802
Re: Setting timing. Sparks in 2-3 point normal??
« Reply #8 on: June 17, 2017, 10:35:16 PM »
A thin grease.  Like lubriplate or a white grease should be fine.

You want a grease that won't congeal or harden over time.  That leaves out anything paraffin based.  Mineral base is ok.
Lloyd... (SOHC4 #11 Original Mail List)
72 500, 74 550, 75 550K, 75 550F, 76 550F, 77 550F X2, 78 550K, 77 750F X2, 78 750F, 79CX500, 85 700SC, GL1100

Those that learn from history are doomed to repeat it by those that don't learn from history.

Offline Deltarider

  • Really Old Timer ...
  • *******
  • Posts: 8,187
  • ... but some animals are more equal than others.
Re: Setting timing. Sparks in 2-3 point normal??
« Reply #9 on: June 17, 2017, 11:33:43 PM »
No, it is not normal. You may check if the breakerpoints set is installed correctly (are all insulator rings including the tiny one in the middle in the correct place?) or is it wobbling? That tiny insulating ring in the very center of the hole where the bolt sits, could be accidentely misaligned causing intermittent sparking.
In general, also check that spadeconnectors at the breakerpoints do not ground intermittently (groundcontact is easily made, the 2+3 set of points in particular!).
Arcing in the gap is a different thing and indicates a faulty condenser. Have a look at the vid, if you will to see the difference between arcing which is wrong and some little sparking which is OK. In this video left condenser (1+4) is bad, right condenser (2+3) is good.
« Last Edit: June 19, 2017, 06:25:02 AM by Deltarider »
CB500K2-ED Excel black
"There is enough for everyone's need but not enough for anybody's greed."