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1979 gs1000

  • Thread starter Thread starter Guest
  • Start date Start date
G

Guest

Guest
So, I rebuilt my carbs and did not count the turns on the pilot screw and air screw. These specs are from another post.

Suzuki Service Manual: October 1979
GS1000
1979
Model: C

Idle Speed: 900 - 1100 rpm
Carb: Mikuni VM26SS
Id no: 49020
Bore size: 26mm (1.023")
Float height: 24.0mm +/- 1.0 (0.94" +/- 0.04)
Fuel level: 4.0mm +/- 1.0mm (0.16" +/- 0.04)
Air screw: PRE-SET (DO NOT DISTURB)
Cut away: 1.5
Jet needle: 5DL36-3
Pilot Screw: PRE-SET (DO NOT DISTURB)
Pilot Air Jet: 1.2
Pilot Jet: 15
Pilot Outlet: Not specified
Needle Jet: O-2
By-pass: Not specified
Main jet: 95
Main Air Jet 1.5
Throttle Cable Free Play: 1.0 - 1.5mm (0.039"-0.059)

I need the # of turns for pilot and air.

I have never seen the pilot screw(bottom front) along with a air screw(left rear). help anyone? I always thought it was one or the other.

Thanks,

Toddk
 
Adjust the side air screws using the highest rpm method. They generally end up about 1 1/2 to 1 3/4 turns out. They have a sweet spot and it's important to adjust them correctly, not just set them to something "that makes sense". Always adjust on a fully warmed up motor.
The pilot fuel screws underneath are sensitive and can take some tinkering to get right. Never seat them too firmly. LIGHTLY. Generally, they come from the factory about 1/2 to 1 turn out. I'd try 3/4 to start if you have a stock intake/exhaust system. Test.
You're working on the pilot circuit, so keep throttle position under 1/5 throttle for the most accurate testing. Pay attention to warm up time, dark exhaust (puff) after idling and then pulling away, correct idling, etc.
If you haven't already, get a quality vacuum sync tool and you'll probably be surprised how much carb synching helps these 4's run smoothly.
The Carbtune tool is very good.
 
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