« previous next »
Pages: [1]   Go Down

Author Topic: what causes arcing at points?  (Read 2557 times)

0 Members and 1 Guest are viewing this topic.

Offline pinnacle

  • Enthusiast
  • **
  • Posts: 176
what causes arcing at points?
« on: April 29, 2009, 08:10:27 PM »
i think i bumped my points setting by mistake and so i set the gap at .330 mm and under throttle with points cover off i can see arcing what up and how do i set the points at their proper spot it is a 78 cb550k please help need answer.
Logged
1974 cb550, 1978 cb550, 1984 honda shadow vt750

Offline kslrr

  • There is always a Blaster when there is a
  • Master
  • *****
  • Posts: 1,542
  • Raising her up right!
Re: what causes arcing at points?
« Reply #1 on: April 29, 2009, 08:23:39 PM »
There will always be a small amount of arcing and is not an indication of improper gap.  Excessive arcing though indicates possibly bad condensers (those small cans wired to the points).
Logged
Now  1972 CB350FX (experimental v2.0)
        1981 CB650c Custom with '79 engine (wifes)
        1981 CB650 engine
        2004 HD XL883C Custom
        1977 Yamaha XS750D (in progress)
Then 1972 CL175
        1964 Yamaha YGS-1T
No ride is a Bad ride

Offline pinnacle

  • Enthusiast
  • **
  • Posts: 176
Re: what causes arcing at points?
« Reply #2 on: April 29, 2009, 08:26:27 PM »
would your point gap affect driveability causing some stumbling?
Logged
1974 cb550, 1978 cb550, 1984 honda shadow vt750

Offline kslrr

  • There is always a Blaster when there is a
  • Master
  • *****
  • Posts: 1,542
  • Raising her up right!
Re: what causes arcing at points?
« Reply #3 on: April 29, 2009, 08:29:04 PM »
Yes it could, because the gap effects the "dwell angle" which determines how long the coils are able to charge.
Logged
Now  1972 CB350FX (experimental v2.0)
        1981 CB650c Custom with '79 engine (wifes)
        1981 CB650 engine
        2004 HD XL883C Custom
        1977 Yamaha XS750D (in progress)
Then 1972 CL175
        1964 Yamaha YGS-1T
No ride is a Bad ride

Offline pinnacle

  • Enthusiast
  • **
  • Posts: 176
Re: what causes arcing at points?
« Reply #4 on: April 29, 2009, 08:33:12 PM »
can you explain how to set them properly and where to make sure the #1 cylinder should be i got screwed up when i did a leak down test i took off the point cover and i think i bumped something because 2-3 wasn't even opening or closing so i tried to set to .330mm but do not know if i through something off timing?
Logged
1974 cb550, 1978 cb550, 1984 honda shadow vt750

Offline kslrr

  • There is always a Blaster when there is a
  • Master
  • *****
  • Posts: 1,542
  • Raising her up right!
Re: what causes arcing at points?
« Reply #5 on: April 29, 2009, 08:37:04 PM »
Do you have a shop maual?  The procedure is explained there.  It involves a litte more that I could explain here and my mind right now is off due to moving between So. Calif. to Las Vegas.
Logged
Now  1972 CB350FX (experimental v2.0)
        1981 CB650c Custom with '79 engine (wifes)
        1981 CB650 engine
        2004 HD XL883C Custom
        1977 Yamaha XS750D (in progress)
Then 1972 CL175
        1964 Yamaha YGS-1T
No ride is a Bad ride

Offline pinnacle

  • Enthusiast
  • **
  • Posts: 176
Re: what causes arcing at points?
« Reply #6 on: April 29, 2009, 08:45:58 PM »
i have a shop manual but only tells the procedure for setting the point gap but not how to ensure i'm starting from the right place to begin with
Logged
1974 cb550, 1978 cb550, 1984 honda shadow vt750

Offline kslrr

  • There is always a Blaster when there is a
  • Master
  • *****
  • Posts: 1,542
  • Raising her up right!
Re: what causes arcing at points?
« Reply #7 on: April 29, 2009, 08:49:44 PM »
Really?  It does not describe how to rotate the engine to the "F" mark for one pair of cylinders and then the other?
Logged
Now  1972 CB350FX (experimental v2.0)
        1981 CB650c Custom with '79 engine (wifes)
        1981 CB650 engine
        2004 HD XL883C Custom
        1977 Yamaha XS750D (in progress)
Then 1972 CL175
        1964 Yamaha YGS-1T
No ride is a Bad ride

Offline pinnacle

  • Enthusiast
  • **
  • Posts: 176
Re: what causes arcing at points?
« Reply #8 on: April 29, 2009, 09:00:11 PM »
no this manual doesn't please explain that part
Logged
1974 cb550, 1978 cb550, 1984 honda shadow vt750

Offline myhondas

  • Not really such a
  • Expert
  • ****
  • Posts: 1,439
Re: what causes arcing at points?
« Reply #9 on: April 29, 2009, 09:15:19 PM »
Besides this link,   http://www.honda4fun.com/man_officina/man_officina.html



there is a bunch of manuals on this site that you can access.

http://forums.sohc4.net/index.php?topic=17788.0



ray
« Last Edit: April 29, 2009, 09:29:23 PM by myhondas »
Logged
1974 CB 750 K4 SHOWROOM
1974 CB 750 K4 IN PART-OUT PROCESS (my original bike)
1965 C100 CUB 50 (PIT BIKE)
1996 VF 750 CD daily rider
1983 VF 1100 V65 Magna in restoration process
SOHC# 5105 11228
Pages: [1]   Go Up
« previous next »