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GS850G VM carb pilot fuel screw location

RustyTank

RustyTank

Forum Mentor
Past Site Supporter
Hello. I have a 1979 GS850G, VM carbs.
I want to confirm that this is in fact where my pilot fuel screw is. Two pics for clarity. I tried to get a better pic but it's pretty tight in there.

If I'm right and that is in the pilot fuel screw, what type/size Flathead screwdriver are you using to turn that screw during an adjustment?
There's only about 2.5" of space between that screw and the starter cover. Is there a special type of screw driver I should be aware of, or just a
really small one? Maybe a 90 degree screwdriver?

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That location is correct.

Most people use a 90 degree screwdriver when the carbs are on the bike

You need to create a proper screwdriver if you can't find one that fits. Brass does not like sloppiness

You should have set that when you took the carbs out for cleaning. Set them at 3/4- 7/8 turn from carefully bottomed

You make corrections with the air screw
 
Big T said:
That location is correct.

Most people use a 90 degree screwdriver when the carbs are on the bike

You need to create a proper screwdriver if you can't find one that fits. Brass does not like sloppiness

You should have set that when you took the carbs out for cleaning. Set them at 3/4- 7/8 turn from carefully bottomed

You make corrections with the air screw
Click to expand...

I appreciate the info Big T.
 
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That damned pilot fuel screw is almost ferkin impossible to adjust with any accuracy even with the proper tool. At least I'm incapable.
 
I have a piece of rubber pipe (i think it was a piece of air line from my local garage) with a slot screwdriver bit wedged into the end. The pipe gives adequate grip and it can be cut as long or short as needed. Used it once or twice, re-set the screws correctly with the carbs off the bike and haven't touched them / it since.
 
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