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Z-1 Mikuni orings

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Guest

Guest
I see our friends at Z-1 sell packages of orings for our Mikuni carbs. I want to order some for my 1100 & wonder what sizes I need. Someone must have measured theirs & wonder if they can post the sizes for the choke, drain bolt, float needle, fuel tubes & pilot screw.

Paul
 
Does Robert Barr - www.cycleorings.com not have what you need ? He will ship you everything except the Stainless Steel bolts.....

by the way, I have found a local place here that has all the rings as well, I just have not gotten around to making up the orders or packages, I still need to confirm sizes, and prices, it might not be cost effective, and I would also supply and sell the SS bolts as well....

Cheers
 
I have ordered many a kit from Mr. Barr, great guy. I wrench on quite a few bikes & see that Z-1 sells packages of orings, 25 to a packet. I want to order them in bulk at a good price so I can put together sets myself when I'm workiing on carbs.
 
Unfortunately, there are no sizes given there.

Still looking.
 
Write Mr Robert Barr and ask him for the sizes. What's the most he can say; no?
 
I think I'd just get them from cycleorings.com, unless I was planning to go into business building carbs. Even then I might still get them from him.
 
This is why I asked the question in the first place. I have these oring specs that someone posted a couple of years ago. Surprisingly none of them match the sizes on the Z-1 website.

Optional Viton O-rings (thick X ID)
Choke plunger: 1.5mm X 10mm
Drain bolt: 1.5mm X 5mm
Float Needle: 1.6mm X 7.1mm
Fuel Tubes: -10 size (1.8mm X 6mm)
Pilot Screw: 1.13mm X 2.70 mm or
optional (1.0mm X 2.5mm)
 
Sorry, but:

I've been pretty generous over the years -- I've given away things on more occasions than I can remember. I contribute to this site every time without fail. I kick in for other 'causes'on this site, usually anonymously. I've done work to complete strangers' motorcycles at my own home. Like many, I kicked in a hundred bucks for the MLC thousand (and had fun doing it).

Usually I have a hard time saying 'no'.

I give out a lot, but I absolutely won't give out my sizes or my suppliers. Period. Those little bits of information represent long-term efforts, outlays, frustrations, trial & error, and investment on my part; these belong to me, and will remain that way.

Anyone with a $15 digital caliper and access to Google can come up with their own numbers and suppliers; you just can't have mine.

Good luck with your endeavor.
 
:clap::clap::clap::clap::clap::clap::clap::clap::clap: Well stated and rightfully so.
 
Last edited:
EDIT: didn't see the post above with this information. Sorry.

The carb rebuild tutorial linked in my signature have the various sizes needed to rebuild BS CV carbs. I've assembled my own O-ring kits before using Viton O-rings (best available to resist degradation from fuel). The only O-ring's that are real hard to find is the small ones for the pilot screws. I've listed two sizes for those because the proper size is hard to find.

McMaster-Carr has a good portion of these available off the shelf. http://www.mcmaster.com/


Viton O-rings (thick X ID)
Choke plunger: 1.5mm X 10mm
Drain bolt: 1.5mm X 5mm
Float Needle: 1.6mm X 7.1mm
Fuel Tubes: -10 size (1.8mm X 6mm)
Pilot Screw: 1.13mm X 2.70 mm or optional (1.0mm X 2.5mm)

Screen shoot of what you need to order from MC. All O-rings EXCEPT for those for the pilot screw. You can try the smaller optional size shown, or get some 1.5 x 2.5 O-rings and then try to skim them on a bench grinder or similar to reduce the OD. The OD is not a sealing surface so if you rough them up some it won't matter.

 
Last edited:
nastyjones said:
This is why I asked the question in the first place. I have these oring specs that someone posted a couple of years ago. Surprisingly none of them match the sizes on the Z-1 website.

Optional Viton O-rings (thick X ID)
Choke plunger: 1.5mm X 10mm
Drain bolt: 1.5mm X 5mm
Float Needle: 1.6mm X 7.1mm
Fuel Tubes: -10 size (1.8mm X 6mm)
Pilot Screw: 1.13mm X 2.70 mm or
optional (1.0mm X 2.5mm)
Click to expand...

what is the meaning of "-10 size (1.8mm X 6mm)" ?
 
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