TOPIC:

Mikaw wrote: Pulled the trigger and completed the purchase threw Keyster Japan. While I’m waiting on them I have a question about the hose shown as circled item 36 on the following photo. Mine are hard and not sure how well they will seal when reinstalled. Problem is I’m not finding replacements. So is it critical they seal perfectly or does anyone have a source for replacements

I just use some good fitting fuel hose.

zed1015 wrote:
I just use some good fitting fuel hose.

I was concerned about the wall thickness of the original hose. I assumed it was to resist collapse from vacuum? What it the function of the hose?

The tube connect the carb bowl vents 1+2/ 3+4 to the atmosphere.

Scirocco wrote: The tube connect the carb bowl vents 1+2/ 3+4 to the atmosphere.

Thank you. Then snug fitting fuel line is it

Christmas in February. All went super smooth. Great packaging, looking forward to getting them installed

Question for the experts. See photo. The original choke plunger on the right, Keyster on the left. Replacement dose not have needle in the bottom. Does it need to be removed from existing and installed in replacement?

You cannot remove the 2mm needle from the old plunger.
The whole thing is machined from one piece of brass.
I know this because alongside making the air corrector jets I also restore the original obsolete plungers and fit new Viton seats.

Thanks Zed1015

Which is the better one to use

I did not use the Keyster plungers. I tried them on one set of carbs but had a difficult time vacum synchronizing them. So I switched back to the originals, although I cleaned and inspected them. If you look in the hole for the choke plunger you will see how the needle fits in the bottom. I figure Mikuni must have done it that way for a reason so why not keep it that way? Since then I've done two more sets of carbs and used the original choke plungers.

Thank you Hardrock. I was leaning toward the original. Like you mentioned, has to be a reason it’s there. But I wanted to know if removing it solved a known issue/problem

I'm surprised that they don't have the needle coming from Keyster .
Not good as it allows no real graduated application of the choke, more like a crude on - off operation.
Looks like you are better off using the originals even if the seats are worn.

I for me never seen a chocke Plunger with a needle guide on any Z1/KZ carb set i have rebuild, good to know that some exeptions are left to learn about!!!!