[swedishandgerman]

Hi Billy,

For that sticking thing you're experiencing, there's no necesity to take the whole carb off. It seems that you have a build up of gum on the needle and perhaps in the aperture of the jet.

It is quite simple to take the needle out of the top, as you say, by undoing the 4 screws and lifting it out together with the diaphram. You may find that the piston (plunger) has a build up of gum around it too which could be preventing it moving properly. While you're in there, there's no point in putting back in an old diaphram; they hole extremely easily and you should buy a couple - one for the replacement and one to keep in your door pocket for spare!

Whatever you do, don't be tempted to rub the needle with anything; the brass is extremely soft and you can change the profile very easily even with a very soft cloth. You should use carb cleaner and soak the gum away. If there is any sign of scoring on the needle, just order a new one. Burlen is very good for carb spares.

You can look into the jet from above once the piston has been removed. Again, don't be tempted to poke the brass with anything to clean it out.

You can clean the rest of the chamber out with carb cleaner. Don't worry about getting too much into the manifold - it evaporates quickly.

It is very unlikely that the jet has moved or has been moved! If it isn't centred properly, the needle won't drop properly without fouling on the jet thereby not letting the piston drop properly. But if you can lift the piston and it drops with a good "clink" onto the bridge, then it's fine.

It's good practise to occasionally peer down inside the chamber when you periodically take the air cleaner off to see if there's a build up of gum in and around the needle. Actually, just spraying carb cleaner down there without taking anything apart can usually sort things out.