[mikestp]

I have seen for other carburetors, a thumb adjustable idle mix screw. However it was very expensive (above 20 bucks) and it was for a different keihin carb. Has anyone seen the same thing for our VB carbs?

Mike...
[email protected]

 

[Franchesco_94]

if you can find a screw the same size and a spring to go on it. i think that would work fine, and be a lot cheaper

 

[mikestp]

Are you suggesting I braze/solder the tip on a machine screw? I dont think it would be accurate...
Or maybe I am misreading what you said?

 

[Franchesco_94]

do you mean this piece?

 

[Franchesco_94]

or is this the screws your talking about?

 

[66Sprint]

Mike... Why would you want "finger adjustable" ones?.... Once they are set, you don't need and shouldn't be changing them...
Idle SPEED screws I could understand, idle MIXTURE not so much.....

 

[mikestp]

Becasue on the honda twin, honda/keihin put them in upside down and in an area I cannot easily reach.

 

[mikestp]

Those are the idle mixture screws. Al I want are bigger heads on them so I can turn them with my fingers rather than use a screwdriver.

 

[66Sprint]

So...You would rather replace the parts (at $20+ each) than buy and use the correct tool?......

Sorry, I just don't understand the logic.....

 

[longdistancerider]

If you find some be sure that the tip and taper of the screw exactly matches the old one or you'll have problems no one can help diagnose

 

[mikestp]

So...You would rather replace the parts (at $20+ each) than buy and use the correct tool?......

Sorry, I just don't understand the logic.....

Perhaps I did not explain myself.... I want to be able to adjust the idle mixture with my thumb and forefinger, rather than try and maneuver a screwdriver upside down to do so. Sufficiently understandable? I actually got the idea to use the "limiting type" caps, but with a few knurls to enable a better grip. I am thinking of soldering a cap to the top....

Maybe you can use a screw driver, but at my age with failing eyesight, thumb screws would be nice.

Or maybe when you visit Vancouver you can drop over and do them for me.

 

[66Sprint]

Well, that does explain it....The correct screwdriver is bevel gear driven at a 90 degree angle and long enough so you hold it horizontally, and can adjust both carbs from one side.....

 

[phil71]

Spec Tools: Professional
A one time purchase, for every bike you'll own.

 

[mikestp]

Well I came up with a solution that costs less than 30 cents to modify the mixture screws. A pair of acorn nuts, soldered onto the knurled ends of the mixture screws. Now I can reach down and turn them in or out without having to get off the bike... Modifications are so inexpensive I can do them on all bikes when I clean carbs.....

Mike...

 

[longdistancerider]

I guess I'm confused here but why would you need to adjust the mixture while sitting on the bike? The only time I need to adjust it after setting it up is when I'm running over 5-6000 ft. for any length of time (days).

 

[mikestp]

Well... Before I set the mixture screws, I take the bike out for a spin. That way it assures me the bike is up to temp. I just find it easy to do while on the bike when i stop for a light. Yes I could also easily do it when off the bike, with my fingers rather than any sort of screwdriver. I suppose I could carry a 90 degree weird screwdriver, but it is not anywhere near as easy to do. I prefer to just twist with my fingers. My eyesight is not anything like it was 40 years ago. As I get on in years it will not get any better, so if I can tune the mixture with my thumb and forefinger instead of a screwdriver, and t only costs 30 cents, I think that is a win. However if you are ever near Vancouver BC, you could drop by and see if I have bikes that need a tune, so you could help me.... Remember to bring your special tool....lol

Mike

 

[longdistancerider]

My "special" screwdriver is @1-1/4" long.
My procedure for mixture is after sync is done to ride @5 miles, set each carb for highest idle, then reset again, ride 5 miles and check.
I may just have to stop by later this year, late summer/early fall.

 

[mikestp]

Of course I have plenty of screwdrivers for all carb tasks including custom made for the pilot jets. What I personally need is a way to eliminate attempting to put a screwdriver into a slot. With my failing vision it takes more than one or two attempts to even get the driver into the slot, or Phillips head. I imagine you have the eyes of a 30 sumthin. My eyes are the eyes of a 60 sumthin.... With Macular Degeneration. But please do drop by.....

Mike...

 

[longdistancerider]

:lol::lol: Welcome to the 'old farts' club. There's a whole bunch of us here that saw "30 something" 30 some years ago.