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Pilot/Low speed jet diameter
- The_Hamster
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07 Apr 2014 21:32 #628277
by The_Hamster
Pilot/Low speed jet diameter was created by The_Hamster
Good day gents;
Doing a basic cleaning of the Keihin 34 Carbs off a 1980 KZ750 LTD (Four cylinder)
The slow speed jet is marked as a #62, I can't for the life of me find what diameter hole this should be when clean. I usually find a piece of copper wire the same or just under diameter and poke the holes of clogged jets with them. But I like to be sure of the hole size before I start jamming wire in that won't fit.
My best guess is the 62 jet is about .0225 if an inch or .57mm. I can find lots of charts for the higher speed jet, but not the low speed.
Doing a basic cleaning of the Keihin 34 Carbs off a 1980 KZ750 LTD (Four cylinder)
The slow speed jet is marked as a #62, I can't for the life of me find what diameter hole this should be when clean. I usually find a piece of copper wire the same or just under diameter and poke the holes of clogged jets with them. But I like to be sure of the hole size before I start jamming wire in that won't fit.
My best guess is the 62 jet is about .0225 if an inch or .57mm. I can find lots of charts for the higher speed jet, but not the low speed.
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- bountyhunter
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07 Apr 2014 22:37 #628284
by bountyhunter
1979 KZ-750 Twin
Replied by bountyhunter on topic Pilot/Low speed jet diameter
I thought the number referred to hole area in circular mils but it's been decades since I screwed with jets so I could be wrong.
1979 KZ-750 Twin
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- undiablo
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08 Apr 2014 07:36 #628317
by undiablo
Kawasaki KZ 750/4 LTD 1981
Kawasaki KLR 650 2011
Argentina - Buenos Aires
Replied by undiablo on topic Pilot/Low speed jet diameter
#62 is the primary main jet. The slow speed jet is #35 and is below the plastic plug.
If you can, use some carb cleaner spray can and then blow with compressed air. It is dangerous to mess with wires inside the brass jets.
If you can, use some carb cleaner spray can and then blow with compressed air. It is dangerous to mess with wires inside the brass jets.
Kawasaki KZ 750/4 LTD 1981
Kawasaki KLR 650 2011
Argentina - Buenos Aires
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- undiablo
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08 Apr 2014 07:51 #628318
by undiablo
Kawasaki KZ 750/4 LTD 1981
Kawasaki KLR 650 2011
Argentina - Buenos Aires
Replied by undiablo on topic Pilot/Low speed jet diameter
By the way if I remember OK, #62 jet is 62% of 1mm --》 0.62mm
Kawasaki KZ 750/4 LTD 1981
Kawasaki KLR 650 2011
Argentina - Buenos Aires
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- The_Hamster
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08 Apr 2014 08:04 - 08 Apr 2014 08:09 #628319
by The_Hamster
You're right, it is a main jet.
How do you get the plastic plug out? Just pull or should I mess with it at all?
From my reading the Keihin jet #'s are based on flow rates, not diameter unfortunately
How does one get to and clean the pilot jet?
Replied by The_Hamster on topic Pilot/Low speed jet diameter
undiablo wrote: #62 is the primary main jet. The slow speed jet is #35 and is below the plastic plug.
If you can, use some carb cleaner spray can and then blow with compressed air. It is dangerous to mess with wires inside the brass jets.
You're right, it is a main jet.
How do you get the plastic plug out? Just pull or should I mess with it at all?
From my reading the Keihin jet #'s are based on flow rates, not diameter unfortunately
How does one get to and clean the pilot jet?
Last edit: 08 Apr 2014 08:09 by The_Hamster.
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- undiablo
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08 Apr 2014 08:12 - 08 Apr 2014 08:13 #628320
by undiablo
Kawasaki KZ 750/4 LTD 1981
Kawasaki KLR 650 2011
Argentina - Buenos Aires
Replied by undiablo on topic Pilot/Low speed jet diameter
May be I was wrong.
You just pull the plastic plug up (AKA polyester cap). It has a small o'ring that holds it in its place. May be it is a good time to replace it.
You just pull the plastic plug up (AKA polyester cap). It has a small o'ring that holds it in its place. May be it is a good time to replace it.
Kawasaki KZ 750/4 LTD 1981
Kawasaki KLR 650 2011
Argentina - Buenos Aires
Last edit: 08 Apr 2014 08:13 by undiablo.
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- The_Hamster
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09 Apr 2014 21:41 #628502
by The_Hamster
Replied by The_Hamster on topic Pilot/Low speed jet diameter
Thanks!
I don't see any o-rings under the plugs, but the plugs do seem to have some sealant that was holding them in place; some black stuff.
Can anyone tell me the height these floats should be set to while I have them out? I read the procedure with the clear hose etc. I would like to set or at least check them before reinstalling however.
I don't see any o-rings under the plugs, but the plugs do seem to have some sealant that was holding them in place; some black stuff.
Can anyone tell me the height these floats should be set to while I have them out? I read the procedure with the clear hose etc. I would like to set or at least check them before reinstalling however.
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