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TOPIC: Keyster Kit, Where to Buy

Keyster Kit, Where to Buy 13 Feb 2020 10:46 #819183

  • hardrockminer
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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.
I have a couple of Z1B's restored, an '80 KZ1000LTD restored, a 1981 KZ550 restored and a 2008 KLR 650 for off road fun. My wife has a 2019 Suzuki DR 650 for on and off road.
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Keyster Kit, Where to Buy 13 Feb 2020 10:50 #819184

  • Mikaw
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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
1976 KZ 900 A4
1976 KZ 900 B1 LTD
1978 KZ 1000 B2 LTD
Kowledge Speaks, But Wisdom Listens.
Jimi Hendrix.

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Keyster Kit, Where to Buy 13 Feb 2020 12:36 #819192

  • zed1015
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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.

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Keyster Kit, Where to Buy 13 Feb 2020 13:09 #819197

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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!!!!
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Keyster Kit, Where to Buy 13 Feb 2020 20:12 #819244

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Mikaw wrote: 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?


Great example of why I hate aftermarket carb kits. Keyster may be better than most but a lot of carb kits are too generic and don't have the exact parts as installed originally.
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Keyster Kit, Where to Buy 13 Feb 2020 20:49 #819249

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Going to be a minute before I'm ready for the choke plunger to get installed. So I'm going to let this debate continue. Which is better, with needle or without. As Scirocco stated he has never seen a plunger with the needle. Is it a US verses European thing. If so is the carb body also different to us a plunger without a needle... I see the needle as Zed1015 states. Allowing you incrementally adjustable enrichment to select idle rpm during choke on warm up...
1976 KZ 900 A4
1976 KZ 900 B1 LTD
1978 KZ 1000 B2 LTD
Kowledge Speaks, But Wisdom Listens.
Jimi Hendrix.

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Keyster Kit, Where to Buy 14 Feb 2020 04:04 #819268

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Mikaw wrote: Going to be a minute before I'm ready for the choke plunger to get installed. So I'm going to let this debate continue. Which is better, with needle or without. As Scirocco stated he has never seen a plunger with the needle. Is it a US verses European thing. If so is the carb body also different to us a plunger without a needle... I see the needle as Zed1015 states. Allowing you incrementally adjustable enrichment to select idle rpm during choke on warm up...


I currently have 10 sets of 26mm and 28mm on bikes and on the shelf and have serviced and repaired at least another 100 from different Z1 and KZ from UK , US and Italian imports etc and have never seen a genuine choke plunger without the needle on these carbs.
Every workshop manual I have, both Genuine factory and aftermarket Haynes and Clymer all show the plunger with needle.
I think Scirocco is mistaken unless some have been modified in Germany for some unknown reason..
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