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cyl 3 and 4 at start

  • Thread starter Thread starter kudzu
  • Start date Start date
K

kudzu

Guest
cyl 3 & 4 don't fire when choke is on when cold. Then they seem to "catch" once it's run with choke for a bit while it stutters. Ease off the choke and it's fires on all four. 3 and 4 are getting gas and spark at all times.

Any ideas?

Thanks,
DB
 
This the 77 gs550? (put in your signature). I say #1 cylinder is under clutch hand-do you agree?
How long does it take these cylinders to "catch" ? does it run ok, after they "catch" ?
 
Hi babes.
Well.... Sounds like the choke airways are a wee bit blocked...
it could, i suppose be sticking exhaust valves or compressed exhaust valve springs but i think its probably the choke mechanism/airway thingys...

Im sure someone else will maybe give you a bettet idea... Me, i think id look at it as a fuel efficient starting process.
... But then, i ride a rat-bike!

Xxx
 
3 and 4 don't catch right away

3 and 4 don't catch right away

Yes, it is a 1977 GS550. Nice detective work. Sorry I made you work at it - I'm new here.
Yes #1 is under clutch hand. If it is choke airways can these be accessed without removing carb set assembly? I fear I may not like that answer.

It takes three or four minutes to get 3 and 4 to light up. Once that happens she runs fine.

Thanks for your help.

kudzu
1977 GS550
 
Sorry to say this but it sounds like you will need to pull your carbs and properly dip, clean, replace orings, and synch them. Do it right in order to start from a good baseline or you will be fighting this problem for a long time. Look at Nessism's carb rebuild procedure on Basscliff's website
 
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