Carb Float Adjustment Clarification

[e3steve]

Thanks Ed; I knew you'd have the correct info!

[brewsky]

HONDA did change the threads on later jets which can be found to have a ring around them.
I have a couple here. .............lm

When all's said & done, the 'right' method results in the correct relationship between the surface-height of the fuel in the bowl, the jet holder/emulsion tube and the carb's choke/throat/venturi (whatever you wish to call it).

Ed knows more about these Hondas than most of us here, put together; his "line of sight" method, as delineated in posts 4 & 8 here, works for him and others.

I use my Honda metal float height gauge; I have PW26 carbs. She runs sweet.

Steve,
Questions, questions.....

Are your jet holder and main jet seated in these pics, or are they loose for picture purposes?

I notice what appears to be a ring around you main jet, which usually indicates "late (current) thread" pitch jets?

Hey Brew, carb(s) are as removed, for powertrain rebuild. All I did was unclip the float bowl, so nothing has been loosened. The bike runs so well that, apart from a bit of a WD40 cleanup, I shan't be making any changes.

The set is a pair of 3K-milers, for which I paid US$300 in '08, from a '67 CL77 and re-needled to suit my CB. I've been told, by a higher authority, that -- contrary to 'words in print' -- all carbs' jet threads are JIS; I have yet to discover different, but perhaps I'll pull some jets and observe the pitch. I'll let you know....

Does that mean there are some jet HOLDERS out there with the current pitch?

That sure would make re jetting easier.

When I bought a handfull of jets initially for my CA, they were all "ringed" and would only screw in a half turn or so before binding up.

[CL77NOW]

i believe they went from JIS old pitch to new ISO pitch, thus the ring
just for fun

I just bought some 5mm JIS (0ld) screws with CL77 pn.
and got new ISO threaded bolts

and no where is the pn changed, no added suffix like A
2 screws,totally diff, .8 versas .9 pitch same part number.
keeps us on toes. LOL

i wonder,do JIS and ISO jets have same height?

[LOUD MOUSE]

I'm not sure which carbs the jets were made for so I don't know if there was a needle jet holder or just into the carb body. ........lm

HONDA did change the threads on later jets which can be found to have a ring around them.
I have a couple here. .............lm

When all's said & done, the 'right' method results in the correct relationship between the surface-height of the fuel in the bowl, the jet holder/emulsion tube and the carb's choke/throat/venturi (whatever you wish to call it).

Ed knows more about these Hondas than most of us here, put together; his "line of sight" method, as delineated in posts 4 & 8 here, works for him and others.

I use my Honda metal float height gauge; I have PW26 carbs. She runs sweet.

Steve,
Questions, questions.....

Are your jet holder and main jet seated in these pics, or are they loose for picture purposes?

I notice what appears to be a ring around you main jet, which usually indicates "late (current) thread" pitch jets?

Hey Brew, carb(s) are as removed, for powertrain rebuild. All I did was unclip the float bowl, so nothing has been loosened. The bike runs so well that, apart from a bit of a WD40 cleanup, I shan't be making any changes.

The set is a pair of 3K-milers, for which I paid US$300 in '08, from a '67 CL77 and re-needled to suit my CB. I've been told, by a higher authority, that -- contrary to 'words in print' -- all carbs' jet threads are JIS; I have yet to discover different, but perhaps I'll pull some jets and observe the pitch. I'll let you know....

Does that mean there are some jet HOLDERS out there with the current pitch?

That sure would make re jetting easier.

When I bought a handfull of jets initially for my CA, they were all "ringed" and would only screw in a half turn or so before binding up.

[CL77NOW]

the bill silvers book covers this IIRC.
but the ring is new ISO threads. and if true, then all jets that size fit.
i will re--read that chapter and report

it is like case screws with the titty,dimple
means ( which metric standard was used) (nonstandard/standard) IIRC
the other confusing fact is there is early and late JIS, (this boggles my mind)

im guessing but late JIS means first conforming ISO threads? dont know for sure.

[brewsky]

When all's said & done, the 'right' method results in the correct relationship between the surface-height of the fuel in the bowl, the jet holder/emulsion tube and the carb's choke/throat/venturi (whatever you wish to call it).

Ed knows more about these Hondas than most of us here, put together; his "line of sight" method, as delineated in posts 4 & 8 here, works for him and others.

I use my Honda metal float height gauge; I have PW26 carbs. She runs sweet.

Steve,
The pic sure looks to me like a new pitch jet trying to go in an old pitch holder.

I don't know about CB/CL's, but my CA jet tightens into the holder flush to the jet head.

Also looks like the float is higher than the line of sight method (richer)?

[e3steve]

When all's said & done, the 'right' method results in the correct relationship between the surface-height of the fuel in the bowl, the jet holder/emulsion tube and the carb's choke/throat/venturi (whatever you wish to call it).

Ed knows more about these Hondas than most of us here, put together; his "line of sight" method, as delineated in posts 4 & 8 here, works for him and others.

I use my Honda metal float height gauge; I have PW26 carbs. She runs sweet.

Steve,
The pic sure looks to me like a new pitch jet trying to go in an old pitch holder.

I don't know about CB/CL's, but my CA jet tightens into the holder flush to the jet head.

Also looks like the float is higher than the line of sight method (richer)?

Brew, I'll carry out some investigative surgery tomorrow(ish) and report back.

Good weekend, everyone!