Carb Screws

[Anonymous]

On the bottom front side of the carbs on my 78 Suzuki GS550E, there is a screw (one per carb) in the big manual i have it says to NOT TOUCH these, as they are factory set.

I read on here that they will controll the richness of the fuel mixture. Is this true? Should i adjust them?

[Anonymous]

I would like to add:

And are these the same as the ones on the engine-side top of my carbs? What do they mechanically do and when do they take effect?

Here in the smaller red circle:



And for comparison, a side shot:



For future reference, are the two circled items in the top photo, plus the idle set screw, the only external carb adjustments?

Michael

[crc1214]

Well, your carbs look entirely different from my 78 gs550E carbs. I suppose this could be a difference in the makes between countries (like I think the ones made for the Asian market had dual front disk brakes, while the US had "economy" models - single disc brake). Or, your carbs may have been transplated from like a 80 or later gs550.

However, I think I may be able to help. Look in your manual for the "air screw" in your carb schematic. If your only looking at your owner's manual, it won't have it. Get a Clymer or Haynes manual. ONLY MAKE ADJUSTMENTS TO THE AIRSCREW TO BE SAFE. It will likely be a brass screw. Turn it in to richen your mixture, turn it out to let more air in the mix and thus lean your mixture.

I beleive the only time you have to adjust the factory pre-set screw underneath the carb is when you re-jet.

Hope this helps.

[Detman101]

Dm of mD