« previous next »
Pages: [1]   Go Down

Author Topic: Help have a 72 cb500 with a 78 frame and exhaust  (Read 536 times)

0 Members and 1 Guest are viewing this topic.

Offline wolfesteel211

  • Full Member
  • *
  • Posts: 13
Help have a 72 cb500 with a 78 frame and exhaust
« on: September 28, 2014, 04:34:10 PM »
I've gone threw and rebuilt the carbs and have found numerous problems. The motor runs so much better but as being new to rebuild I have done as much research as I can . I think I need to set the needle jets to another setting due to the exhaust system being completely different ? Anyone who has any advice or trouble shooting would be greatly appreciated.
Logged

Offline calj737

  • Really Old Timer ...
  • *******
  • Posts: 21,020
  • I refuse...
Re: Help have a 72 cb500 with a 78 frame and exhaust
« Reply #1 on: September 28, 2014, 05:21:56 PM »
What exhaust is it? Stock 4:4 from the '78? Air induction system? Biggest differences really are the 78 carbs had a cable choke and less tuning options. It's difficult to say "how" they should be set as carb settings are also contingent to the carb body, not just the motor year.

I'd start with stock settings for the origin of the carbs, then test them with plug chops or best, on a dyno.
Logged
'74 550 Build http://forums.sohc4.net/index.php?topic=126401.0
'73 500 Build http://forums.sohc4.net/index.php?topic=132935.0

"Of all tyrannies, a tyranny sincerely exercised for the good of it's victim may be the most oppressive. It may be better to live under robber barons than under omnipotent moral busybodies. The robber baron's cruelty may sometimes sleep, his cupidity may at some point be satiated, but those who torment us for our own good will torment us without end for they do so with the approval of their own conscience." - C.S. Lewis

Offline harisuluv

  • Master
  • *****
  • Posts: 2,009
Re: Help have a 72 cb500 with a 78 frame and exhaust
« Reply #2 on: September 28, 2014, 05:45:05 PM »
Well.. we need to know more about all your specs... a simple, well framed picture would tell most of the story.

No one is going to be able to "troubleshoot" any of your problems without knowing what they are.  Without the symptoms no one is going to be able to tell you what exactly is wrong.
Logged
Pages: [1]   Go Up
« previous next »