Need Help with some ingenuity

[nzemke]

So first of all I want to say that my budget is pretty low which is why I haven't just replaced the carbs.

I think you can see by the images what I'm up against.



So far I have tried JB weld and some good old fashion electrical soldering. But all just pop out. The initial drilling was at 1/16th which as I found out later was WAY over what it should have been. I went into the Dremel area in homedepot and found a 1/32 which I found to be the same size as the other holes.

So my question is what can I use to fill it in and then drill the correct hole size?

[bikerphil]

I wouldn't even worry about it. I have the same issue, I just shortened the mixture screw springs a little so the tip can go further down, it can still be tuned, just a little more sensitive. YMMV

[nzemke]

I tried screwing it all the way in while using the colortuner and it just went from super rich to super lean. Thinking I really over screwed it if I could close it up just a hair it would make a HuGE difference.

[bikerphil]

Another solution would be to custom grind one of the mixture screws for a better fit to the enlarged hole. With it sitting down lower with a shortened spring you might be able to get a smoother adjustment. I can't recall anyone having any success filling in those holes for redrilling and having them hold up for any length of time. Maybe if you can weld aluminum you might have some luck, or end up ruining the carb.

[Tenorman]

Just food for thought...

Because the mixture screws are brass, it would be easy to add a bit of solder on them and then see if you can't make them a bit bigger....

You may have to use silver solder as the lead stuff may be too soft and just deform when you try to adjust them....

Just a thought....

The Tenorman

[nzemke]

yeah I tried to get the solder thing to work and had a hell of a time getting the right amount to stick...and to be even. But as I laid in bed thinking about the darn thing about 11:30 last night it struck me like a ton of bricks...Aluminum foil tape! So I took a small piece and made a patch. Then pushed the screw in far enough to make a small indent. Then used the proper drill bit size and make the right size hole. I just cleaned it up from there and the holes are now the same size!! This has puzzled me for the last year! I got up early and re synced her this morning and she sounds a hell of a lot better! Tonight will be the real test when I attempt to tune the mixture screw

[Tenorman]

I never thought of that....

That IS a good idea...

My next thought was to tig weld a bit of aluminum in the hole (that would take a good welder) and the grind off the weld even with the carb throat and then re-drill the hole...

I hope you have a good time on the bike tonight...

Tenorman

[TopCatGr58]

Hey there Nzemke,

Because the hole that you patched is larger, there's room for the FUEL to get in UNDER and INBETWEEN the foil tape and carb body disolving the GLUE that secures the tape to the carb body. Granted that tape is quite sticky and so hopefully the fuel won't penetrate very far under the tape. And I would hope you cleaned/degreased the inner carb throat well before applying the tape, so hopefully it won't every come loose and get sucked into the engine!?

Hope it holds up!
T.C.

[James England]

Sticky tape will surely come off in an environment with gasoline, gasoline vapour and air getting sucked into the carbs. IMO, there's no way that it can be a solution.......

[Old Red]

Could you go around the hole with a small center punch and close up the hole some.

The Other Earl

[nzemke]

Sticky tape will surely come off in an environment with gasoline, gasoline vapour and air getting sucked into the carbs. IMO, there's no way that it can be a solution.......

certainly not a long term solution but if it gets me down the road till I can save for a replacement bank, its a good solution to me. And I will check it regularly and more then likely replace it once every two weeks or sooner if it should need it. I will just have to keep an eye on it and update this post...I know it seems it is one of those solutions that's just to simple to be the fix. But I will report mileage and wear so maybe someone in the same situation has a chance of getting her running till they can save a few bones.

And it would seem to me that there won't be any gas except the vapor after the engine is turned off. Other wise its just air being sucked through that hole. Maybe on the next go around I will throw a little jb weld into the hole to seal the gum side completely.

[nzemke]

Could you go around the hole with a small center punch and close up the hole some.

The Other Earl

Not sure if there is enough room to get in there

[skids]

I wouldn't even worry about it. I have the same issue, I just shortened the mixture screw springs a little so the tip can go further down, it can still be tuned, just a little more sensitive. YMMV

Ditto. In my case the pilot screw was backed off something like 2/3 turn from seated. It ran ok but popped while throttle was closed decelerating down hills. It was annoying and I swapped it out.

[James England]

certainly not a long term solution but if it gets me down the road till I can save for a replacement bank, its a good solution to me. And I will check it regularly and more then likely replace it once every two weeks or sooner if it should need it. I will just have to keep an eye on it and update this post...I know it seems it is one of those solutions that's just to simple to be the fix. But I will report mileage and wear so maybe someone in the same situation has a chance of getting her running till they can save a few bones.

And it would seem to me that there won't be any gas except the vapor after the engine is turned off. Other wise its just air being sucked through that hole. Maybe on the next go around I will throw a little jb weld into the hole to seal the gum side completely.

Yes, there will be gasoline vapour after switch off, from the float bowls but mainly air during operation. As you say, it will keep you on the road until you can get it sorted out so, in that sense, it's a 'fix'. Long-term though, you obviously need to get it repaired properly, I'd say. If the patch comes off and gets sucked into the carb, Sod's Law says it will jam the carb slide open, with all the associated hazards.....

[nzemke]

Yeah my fear is from the thing falling into the engine. I'm only riding it for about three miles at a time. So I think I will have to check it every Couple days.