Blockage in Mikuni bowls

[uteman]

Thanks to geol:
Your time taken in responding is greatly appreciated. With all of the assistance offered I will get this sorted.

[uteman]

The function: you will see that there is a small copper tube attached to the main carb body that slots into this orifice. This sucks up fuel from the float bowl for the choke / starter circuit.

The "Fuel to starter jet" on this diagram:

londonboards: Firstly, I wish I could draw like that. Great effort indeed. Secondly, I cannot thank you enough.

[JTGS850GL]

Do the heat soak method to melt the gunk. Then shock it with a spray shot of carb cleaner. Poke it with the wire from the brush in the tutorial. Make sure you do it from both ends. Use the plastic tube from the carb cleaner and feed it from both sides. You'll know when it's clear when you have a good solid stream of spray coming out.

[geol]

There is a check valve. I stand by this. It is often clogged be they BS or VM carbs. Go ahead and run a drill bit down through the well and you will find out a little bit about the check valve. If you try and use the bowl on a carb after that, you will find out why there is a check valve all over the floor of your garage.

[JTGS850GL]

There is a check valve. I stand by this. It is often clogged be they BS or VM carbs. Go ahead and run a drill bit down through the well and you will find out a little bit about the check valve. If you try and use the bowl on a carb after that, you will find out why there is a check valve all over the floor of your garage.

Stand by all your want, but there is no check valve. There is a restriction on the bottom but not a check valve. Why on earth would there be anything on the floor of the garage? Are you sure you're not thinking of the float valve?