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setup on carbs gs550 1977

  • Thread starter Thread starter nelly35
  • Start date Start date
N

nelly35

Guest
Just got a engine for my 1977 gs:-D
now i have a cv carb but they have been mested about with ie balancing air screws pilet screws...all taken out and replaced but all over the show(not by me),thus bike runs bad.:(
very slow on pick up and only does about 40mph.:?

GS550E
1977
52,000miles
cv head and carbs

Is there anyone that knows or has the set-up info on my carbs????[-o<
sorry about smiles but its how i feel
 
as per other thread found in search

GS550L (77-79) the specs are for the VM's

idle r/min 1100-1200
carb mik vm22ss
id no 47110
bore size 22 (0.87)
float height 24.+/-1.0 (0.95 +/-0.04)
fuel level 4.0+/-1.0 (0.16 +/-0.04)
air screw 2.0 turns back
cut away 1.5
jet needle 5dl35-3 (the -3 3rd notch??)
pilot screw 1.0
pilot jet #15
pilot outlet 0.6
needle jet 0-6
by pass 1.0
main jet #80


GS550 (80-82) the specs are for the CV's

idle r/min 1100-+/-100r/min
carb mik bs32ss (4 seprate carbs)
id no 47160 (us) 47170 (can)
bore size 32 (1.26)
float height 22.4.+/-1.0 (0.88 +/-0.04)
fuel level 5.0+/-0.5 (0.20 +/-0.04)
main jet #92.5
main air jet 1.6
jet needle (4bel2 us model) (5f42-3rd notch canadian adjusable needle)
needle jet x-6
pilot jet #40
throttle valve #135
by pass (0.9, 0.7, 0.7 us model) (1.0,0.8,0.8 canadian)
pilot outlet 0.7
valve seat 2.0
starter jet #35
pilot screw 3.5 turns back (mixture screw)
pilot air jet (us model #150) (#120 canadian)

these setting apply to all 550 models with the CV style carbs,
Me personaly would try to get the carbs as close to the the canadian specs as possable the US models were lean out so much to meet emissions. the candian specs give the bike a hardier fuel supply.
 
thanks

thanks

many thanks will try next time to search harder.\\:D/
 
Don't know about those carbs, sound like trouble to me.
Since you specifically ask about the mixture screws....set them initially to 1 1/2 turns out. On the CV's, that will be close to factory and any serious problems (wont go over 40) will not be the fault of incorrect mixture screw adjustments.
On a correctly running bike, you would then fine tune the mixture screws using the highest rpm method.
I think you have other issues, but go ahead and try the screw adjustments and see if it improves.
 
Another thing that will cause your slow pick-up and limited speed...

Do you have air filters installed?

CV carbs are very sensitive about having a bit of restriction on the intake side. If you don't have the stock airbox, you need to have individual pods installed. I know that installing the stock box is a pain, as I recently worked on a friend's '79 550. What I have found that works FOR TEMPORARY USE is to double over a shop rag, place it over the carb intakes, then tie-wrap it to the throats of #1 and #4 to hold it in place. This provides just enough restriction to to a road test, but I don't feel it is accurate enough to do jetting tests or spark plug reads.


.
 
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