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TOPIC: BS34 Pilot Plugs

BS34 Pilot Plugs 10 Jul 2019 12:17 #807327

  • jayrodoh
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I've got an 82 750 CSR M1 I'm slowly working on. It runs absolutely horrible and I'm looking into carb jetting. All my bikes are stock and I've never had to rejet so it is a new skill to learn. While researching I ran across the diagram in the FSM that shows pilot plugs below the jet. I'm familiar with them in other carbs but I don't recall these carbs ever having them. Ive found some diagrams show these plugs and some do not, seems par for the course on these older bikes. I pulled a bowl and the bowl does have the raised part to hold the plug but I cannot find any hole in the cavity that would feed from the main jet. Unless I'm missing something I don't think these carbs need them.

Bowl:


Carb:
1982 KZ750-M1 CSR
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BS34 Pilot Plugs 10 Jul 2019 18:13 #807336

  • Nessism
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Last edit: by Nessism.

BS34 Pilot Plugs 11 Jul 2019 05:12 #807345

  • martin_csr
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I've found some diagrams show these plugs and some do not,

From the carburetor parts diagram at Partzilla for the 1982 KZ750-M1 CSR, there is a plug & gasket.
A couple of oem plugs are listed on EB, but I did not see the gaskets.

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Last edit: by martin_csr.

BS34 Pilot Plugs 11 Jul 2019 05:49 #807350

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martin_csr wrote: From the carburetor parts diagram at Partzilla for the 1982 KZ750-M1 CSR, there is a plug & gasket.


I think you might be looking at the wrong plug, I do not see them on the fiche for the 82:



Where I did see them is in the FSM for the KZ750. What is weird is they list it as an 81 KZ750 M1 which to my knowledge they never made.



I have found some references online that the BS34 was made both ways but I cannot find any pics to compare. From what I can see I do not have a passage from the main jet area to the pilot jet area on mine.
1982 KZ750-M1 CSR
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BS34 Pilot Plugs 11 Jul 2019 05:55 #807351

  • SWest
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That's what I was going to ask. If there's no passage the plug isn't needed.
Steve
Z1b1000 1975 Z1b
Opinions expressed by me do not reflect those of the the staff or members
kzrider.com/forum/11-projects/598262-kz-...-will-it-live#672882
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BS34 Pilot Plugs 11 Jul 2019 13:20 #807381

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SWest wrote: That's what I was going to ask. If there's no passage the plug isn't needed.
Steve


No passages on this one. I reached out to WG and he confirmed that these carbs do not need a plug. The passageway (if equipped) is visible about 1/8" down the pilot well.
1982 KZ750-M1 CSR

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