What is CORRECT float height

you should also check the tide charts for your area and never set during low tide

 

LOL

 

This is a really useful, informative thread, well done contributors all.

 

Teacher hat on:

Most people learn and communicate in a similar way, but not everyone does. Asking for clarity is not wrong, but it can indeed be frustrating when we assume that we have already communicated clearly to begin with. Put aside the assumptions and clarify (as several here have) even when it's frustrating to do so. I'm not innocent of assuming that the learner communicates and thinks in the same way that I do. This thread is an example of humility and perseverance as applied to problem-solving. Well done.

 

As a teacher in the profession myself I have to more often then not create ways to get my student to understand something. I often take for granted the knowledge I have learned and cultivated over the years and expect a student to understand it instantly forgetting the journey I once took to figure something out. In this case I am still the humble student and I am the type of guy to ask the same question probably 3 different times in 4 different ways. But I don't give up and I am always grateful to the people who don't give up on me as well. Thank you everyone. Now time to rebuild some carbs.

 

That’s what we’ve been saying all along

 

What is correct BS30 float bowl volume when drained?

 

What bike?

 

Any bike that takes a BS30. Mine is a Yamaha Turbo.

 

The fuel level can vary based on the application. I don't think I've ever seen the volume measured anywhere. From the archive:

Mikuni BS30 (all XJ650 Turbo): -Fuel level measured via the clear-tube gauge: 2mm +/- 1mm (.08 +/- .04 inches) -Float height: 17.5 +/- 0.5mm

 

But, the cheat sheet says—

 

Rub roh raggy, I got that from the PDF linked in the thread you got that from.

Stick with the fuel level method and you’ll be okay, I think it’s a better way to set it anyway.

 

That’s right off the cheat sheet.

 

Yah I see that, the PDF and the fuel system thread have different specs:

 

Hmmmmm

 

Dave, Remember when you and Len were discussing my Turbo carbs and discovered the error in one of the references you were using? I don't know which one was correct though. I eventually wet set mine and did not measure the float height after.
John

 

I remember, and figured you’d pipe up here

 

@Simmy

or just wet set and be done

 

just rebuilt 4 HSC 32's. the new float needles and seats are much shorter than the ones i replaced. the 17.5 mm dry float levels DO NOT WORK, however, it appears that if your fuel levels were properly set before you replace these, they will still be in the ball park. the parts i was able to get are K&L 10L-14390-02 (18-8937). i don't know what these were set when i dismantled them, they do appear to have been near the 17.5mm (11/16") dry levels.

i guarantee you that if you try to achieve the 'dry' level of 17.5mm, you WILL have problems.

 

If the fuel valves are that different, then I’d question if you have the right fuel valves