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83 KZ750 shaft keihin pilots?
- rboutin2
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- undiablo
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Late 82 and 83 model had the Keihin CV34:
Secondary main #100
Jet Needle N10C
Pilot #35
Earlier 80 and 81 had the Keihin CV34:
jet needle----N01A
main jet primary----#62
main jet secondary---#125
pilot jet---#35
This set has a particular nice transition from idle to wide open throttle.
Kawasaki KZ 750/4 LTD 1981
Kawasaki KLR 650 2011
Argentina - Buenos Aires
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- Patton
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May have overlooked, but not seeing description of the air intake system -- stock air box? Pods? Type filter? Paper? Oiled mesh? Foam?
Good Fortune!
1973 Z1
KZ900 LTD
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- JR
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undiablo wrote: That is right.
Late 82 and 83 model had the Keihin CV34:
Secondary main #100
Jet Needle N10C
Pilot #35
Earlier 80 and 81 had the Keihin CV34:
jet needle----N01A
main jet primary----#62
main jet secondary---#125
pilot jet---#35
This set has a particular nice transition from idle to wide open throttle.
Ahhhh. The light goes on,!!!
That would explain it. Something I had not known.
My apologies for the confusion
1980 kz750E1, Delkevic exhaust
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- rboutin2
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Patton wrote: Am understanding that the exhaust system at hand is a 4>2 without baffles.
May have overlooked, but not seeing description of the air intake system -- stock air box? Pods? Type filter? Paper? Oiled mesh? Foam?
Good Fortune!
Correct. The exhaust is the stock 4 into 2 without baffles. I hollowed the megaphones. Airbox is stock with a stock air filter. New boots on both engine and air box side. New o rings in pilot screws. Pilot screws are all about 3 turns out. Valves are within spec. Iginition coils read 2.6 ohms on both. I am assuming from the way it seems like its starving for fuel that its the pilot circuit. So i would like to go up in sizes on my pilots and mains both. My local shop says I should be at a 45-48 on pilots and a 130-140 on mains. I was gna try drilling my stock pilots cuz you can't get anything bigger and go up slightly each time til it runs right. And buy some mains from z1 and start at 120 and work up if needed. Thoughts on this?
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- undiablo
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Pd: you should clean the carbs internal passages like if they were surgical tools.
Kawasaki KZ 750/4 LTD 1981
Kawasaki KLR 650 2011
Argentina - Buenos Aires
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- rboutin2
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- undiablo
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I would start with upgrading the main jet from 100 to lets say 110.
Kawasaki KZ 750/4 LTD 1981
Kawasaki KLR 650 2011
Argentina - Buenos Aires
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- rboutin2
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- undiablo
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110 is a very good starting point. Let us know how it works!
Kawasaki KZ 750/4 LTD 1981
Kawasaki KLR 650 2011
Argentina - Buenos Aires
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- Patton
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The most significant difference between then and now is removal of the baffles.
Would retain the 35 pilot. Especially if there's consistent idle with strong pullaway and smooth performance at low throttle positions. Which indicates the pilot screw is capable of maximizing low rpm performance with the 35 pilot jet, absent the muffler baffles.
Would perform high speed throttle chop testing (plug readings) to diagnose whether a larger main would provide improved mixture at wot. If only very slightly too lean, perhaps one size larger main would be sufficient. But it's usually a matter of testing with different main jet sizes to achieve the best mixture at wot.
Would not expect a larger main to have much if any effect on mixture at less than wot. Because at less than wot, the mixture is mostly controlled by jet needle taper inside the needle jet.
Good Fortune!
1973 Z1
KZ900 LTD
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- rboutin2
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