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what is the screw for?

  • Thread starter Thread starter imlost
  • Start date Start date
I

imlost

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in the picture,what is that screw for, theses carbs are on my 79 Suzuki 550E, i had to replace the oems with another set as the originals were damaged, reset these screws to the original settings, after the soak and rebuild, but now to sync the carbs, are they idle air screws? some high speed mix? don't see them in the manual i have.
Joel
 
You also have pilot fuel screws, under the carbs near the front. If you have the airbox and stock pipes, turn out about 3/4 turn (more with modifications)

The pilot air screws in your picture, start at 1 1/2 turns out

You sync from the top with a different screw

See BassCliff's site prior to proceeding
 
See BassCliff's site prior to proceeding
i did not see these in his carb pictorial, Mybe i misssed that,so these are idle adjustment screws? and to be adjusted last? at idle correct? and WOW you guys are "johnny on the spot fast" for replies..:)
Joel
 
Not "idle" adjustment screws...air mixture screws. They adjust how much air is mixed with the fuel in the pilot, or idle, circuit. If they are not set correctly, your bike will either run lean or rich depending on if there is too much air (lean) or not enough air (rich).
 
The idle screw is that big knob between the #2 and #3 carbs

You sir, apparently have a lot to learn

1st lesson - you have VM series carbs. If you've been reading about the BS (aka CV) carbs, look for the proper information

You have to adjust the fuel mixture, the air mixture, synchronize all 4 carbs, then reset the idle

It's all pretty easy
 
thank you nessism, that will put me on my way, i will post an update later.
Joel
 
Good luck Joel

Just read up on the carbs, give them a good cleaning and O rings and you should be good for another 10 years!
 
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