Tool for adjusting pilot fuel screw?

[Chuck78]

Bandit is talking about the pilot fuel screws on VM carbs, which are by the float bowls.

I used a stubby screwdriver, which I further chopped down. 1 turn out on those screws is typically too rich. Try between 3/4 - 7/8 of one turn for a start.

Same here, the tiny Harbor Freight or Tektron mini stubby screwdrivers with the handle shaved down a bit.

I also have a Motion Pro cable operated 90? screwdriver for Honda carbs slightly modified to fit GS/KZ VM carbs

[Guest]

I'm working on getting my '77 GS750 running and rebuilt the carbs yesterday. I adjusted the pilot fuel screws to 1 full turn out as suggested in the rebuild tutorial, but once the carbs are on the bike carb 2 & 3 pilot fuel screws are a real pain to get too. I cut off the end of a screwdriver short enough to fit under there, but I can barely get my hand in there to turn it. Is there a special tool out there to adjust these screws while on the bike? Or any other ideas? Or, do I have to pull the carbs every time I need to make an adjustment? I sure hope not... Any help is appreciated, thanks!
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I searched the forum but didn't come across anything concerning my question specifically.

I use an adaptor that joins a quarter inch drive with screw bits. It is a blue aluminum disk with knurled sides. Easy to manipulate with your fingers and you can quickly interchange different screw bits. I insert a long drill flat bit and twist away. Can send photo if you would like to see

[Guest]

Kobalt is the manufacturer
BB5C58A4-F21A-4FBB-BB30-9CE95DB44CC1.jpg

[Chuck78]

Kobalt is the manufacturer
[ATTACH=CONFIG]63810[/ATTACH]

I also have that setup for the VM fuel screws, along with a modified Motion Pro right angle cable drive screwdriver, and modified Harbor Freight micro sized thumb screwdrivers.

The Motion Pro right angle screwdriver works significantly better on a hot engine as to not burn yourself, but it is sometimes difficult to find the slot in the screw.

[Chuck78]

Certain Kawasaki KZ1000 or maybe z1r models around 1977 - 1979 used a VM 26 or actually VM28(?) with the fuel screw on the bottom and had a knurled extension that hung down below so that you could just grab them and turn them with your fingers, from what I'm recalling. I meant to track down some of those.

[Maddevill]

The Motion Pro tool is the bomb. That's also what I use.

Mad

[Chuck78]

Here ya go, this is what I was thinking of, I'd seen a set of these on rack of VM28 Z1R or KZ1000 carbs I'd picked up a little while back. Extended screw head with knurling & flathead slot. Plus you get a proper o-ring, the most common o-ring needing replaced in these carbs:

https://www.z1enterprises.com/fuel-screw-mikuni-vm-carb.html

[93Bandit]

Kobalt is the manufacturer
[ATTACH=CONFIG]63810[/ATTACH]

I'm going to bite the bullet and order the motion pro tool, and I will pick up one of those tools. Thanks for the suggestion!

Here ya go, this is what I was thinking of, I'd seen a set of these on rack of VM28 Z1R or KZ1000 carbs I'd picked up a little while back. Extended screw gead with knurling & flathead slot. Plus you get a proper o-ring, the most common o-ring needing replaced in these carbs:

https://www.z1enterprises.com/fuel-screw-mikuni-vm-carb.html

Man that's brilliant, why didn't everyone do this??? Makes so much sense to me.