Hi Guys,Mikuni carb. Fuel flows until I put the float chamber on. Then fuel will not flow. At all.  Cheap carb from Ebay engine starts with 1 kick and immediately revs to 8000 rpm with choke. Turn off choke and it dies. NO CHOKE, DOES NOT START. Change main needle and set on #2 slot to lessen the richness and same thing.  I would really love to use the Mikuni carb but can’t figure out why the fuel won’t flow with the float chamber attached. No rubbing, needle is not stuck. Fuel flows without chamber and float works when I activate it. Any suggestions?
Ts

With the Mikuni, I would suggest that the float height needs adjusting.

Yep, did that. Tried changing needle and position. Even tried different floats. Thought maybe they were getting hung up on the chamber.Thought maybe the air vent was clogged but air passes through. Putting it back in the ultrasonic today just to make sure. I've cleaned this carb at least 6 times but after reading the posts here, 1 more time won't hurt.

Well look at me! Mr. Smarty pants (me) just re adjusted the float and you were correct!

Next time you give me advice, I will NOT question it!!!

Still need to adjust but it fired up on first kick.

Thanks you.

Ts

Is the float upside down if you had to bend the tab a lot from what is reasonable to get the result.

Okay. Carb issue fixed but, only runs with choke on so I'm thinking air leak. When I first got it runnining after rebuild, I found out the muffler was plugged up. Wound up putting it in the bon fire and now exhaust is good.

But, while it ran with the muffler plugged it was exhausting below the head. Could I have blown the head gasket? If so, would that contribute to it being too lean?

I am pretty sure it's not leaking air around the carb.

Thoughts?

Actually below the cylinder not the head.