Which way do the emulsion tubes come out?

[Incubus]

Do I tap them up from the bowl side into the neck, or down from the neck into the bowl. These suckers are pretty jammed and don't want to come out easy. So I will have to tap them pretty hard. I want to make sure I'm going the right way....

[psycoreefer]

Tap from the bowl side out into the neck of the carb. You'll need to remove the tops and slides if you haven't already.....

[Incubus]

They are disassembled except for the emulsion tubes. I haven't decided if I am going to separate the rack. Thanks for the help.

Patrick

[tinman905]

They look in rough shape you might want to take them completely apart and soak them in some cleaner . Replace the butterfly seals while you're at it.

[Incubus]

I am thinking I am going to soak them, Tinamn, but I was going to soak them in Yamaha Carb cleaner. I've been told that stuff doesn't harm rubber seals. The last time I tried to replace my butterfly seals all I succeeded in doing was stripping a bunch of those little screws that hold the butterflies in.

Patrick

[Geezer]

If the tubes are stuck, try a 1/4" wood dowel as a punch to drive them out but don't be too aggressive.

Geezer

[John]

One tip to removing the tubes is once the main jet and washer have been removed, thread the main jet back in a couple of turns, and while the screwdriver is still engaged with the slot on the jet, give the end of the screwdriver handle a couple of shap blows. That will help to break the corrosion seal around the alignment pin that sits just below the threads for the main jet. Soaking in a good penetrant won't hurt either. Like Geezer said, use a wooden tool, a dowel, or my favorite, a pencil, to drive the tube out. Don't use anything metal to drive it out, that will ruin the threads in the tube where the main jet screws in.

[Ivan]

I am thinking I am going to soak them, Tinamn, but I was going to soak them in Yamaha Carb cleaner. I've been told that stuff doesn't harm rubber seals. The last time I tried to replace my butterfly seals all I succeeded in doing was stripping a bunch of those little screws that hold the butterflies in.

Patrick

Those little screws are staked from the back side. A dremel to remove it helps immensely, then remember to stake them again when re assembling.

[newc4]

There is also a brass pin near the jet end that helps align the emulsion tube. Some aggressive hammering without looking for it will shear it off. Don't ask how I know.

Darrell

[petejw]

They look pretty nasty,
I think you might struggle with them if you dont replace the butterfly seals.

Ive never had a problem removing butterfly screws
if you undo them like you would use a tap and die, quarter turn at a time
then back again, dont let the bolt get to hot and use a penetrating oil, i also use a perfect fitting phillips driver and start with a wack with the hammer to the bolt to break any seal. I also use locktite putting them back together.

[Ivan]

They look pretty nasty,
I think you might struggle with them if you dont replace the butterfly seals.

Ive never had a problem removing butterfly screws
if you undo them like you would use a tap and die, quarter turn at a time
then back again, dont let the bolt get to hot and use a penetrating oil, i also use a perfect fitting phillips driver and start with a wack with the hammer to the bolt to break any seal. I also use locktite putting them back together.

The perfect fitting screw driver is actually called a JIS (Japaneese Industrial Standard) and they are just different enough that a phillips will not grip right. But your suggestion also bears the solution. A good whack with a hammer on the end of the screw driver not only jars the thread loose, it also "drop forges" the screw to fit a phillips driver. Probably better than regular phillips screws. I always grind the backs off the screws. Working on QJets, the damn things ran a risk of breaking the head off the screw, and that got to be a real pain in the throttle.