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hesitation off idle
- megadub72
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1979 KZ1000ST daily rider
Aftermarket Header 4-1
1980 KZ1300 project
Stock, so far
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- koolaid_kid
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1983 GPz 750
810 Wiseco, Kerker, K&N, DynoJet S3, Accel, Progressive, etc.
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- Patton
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Re-sizing the main jets might or might not improve carb performance in the WOT (wide open throttle) range, but won't influence the "hesitation off idle."megadub72 wrote: ... am planning on pulling off the carbs next to change out the main jets....
But with carbs removed, the pilot circuits may be cleaned, which will likely reduce and perhaps eliminate the hesitation off idle.
Here's one cleaning method to consider:
Note that the pilot adjustment screws in the above diagram are side-located, as in this example:
If carbs have bottom-located pilot screws (instead of side-located pilot screws), the above procedure may be adapted to accomplish the same objective of assuring clear mixture passage into the carb bore.
A proper bench sync should also be performed, being sure to have the throttle screw set in about its middle position before adjusting the slide heights. Which is to enable further lowering when performing the final sync with engine running.
Good Fortune!
1973 Z1
KZ900 LTD
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- sbc1320
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koolaid_kid wrote: Not sure what folk on this forum use, but on another forum the Morgan Carbtune is considered the gold standard. It's a one-time investment, and well worth it iMHO.
That is the one I bought to do this bike with. I had one before that I used on my last KZ900. I should have kept it, but sold it after I sold the bike. I am keeping this one this time.
1980 KZ1000 LTD-B4(MK II engine) - Progressive suspension, MTC pistons, Dynojet Stage III, all wear items replaced, WFO paint scheme(1978), etc..
Past bikes- 2 1976 Kz900's, 5 1975-76 Honda CB750's, Honda 500 -4, Honda 250, Honda 125, Honda 100, Suzuki RM 250, Honda XL350, Kawasaki KLR 650, etc..
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- megadub72
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1979 KZ1000ST daily rider
Aftermarket Header 4-1
1980 KZ1300 project
Stock, so far
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- Nebr_Rex
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Is a fuel filter being used?
.
2002 ZRX1200R
81 GPz1100
79 KZ1000st daily ride
79 KZ1000mk2 prodject
78 KZ650sr
78 KZ650b
81 KZ750e
80 KZ750ltd
77 KZ400/440 cafe project
76 KZ400/440 Fuel Injected
www.dotheton.com/forum/index.php?topic=39120.0
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- Nebr_Rex
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megadub72 wrote: When I sit at a light, it idles just fine. When I get ready to go from the light, if I just go straight to throttle, it will die. If I tap the throttle first, then takeoff there is no problem. It is apparently a weak point, but I do not know if it is a needle position or a pilot jet problem. Has anyone dealt with this hesitation off idle? How did you fix it?
Check needle clip position.
.
2002 ZRX1200R
81 GPz1100
79 KZ1000st daily ride
79 KZ1000mk2 prodject
78 KZ650sr
78 KZ650b
81 KZ750e
80 KZ750ltd
77 KZ400/440 cafe project
76 KZ400/440 Fuel Injected
www.dotheton.com/forum/index.php?topic=39120.0
.
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- megadub72
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I do not know much about needle clip position, but should I wait to check those until after I see if a larger jet fixes the problem? Like change only one thing at a time?
Thanks for the help.
1979 KZ1000ST daily rider
Aftermarket Header 4-1
1980 KZ1300 project
Stock, so far
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- 74ullc
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Pg. 18 in mine...
Preliminary Checks :
Engine Oil
Spark Plugs
Ignition Timing
Throttle Cables
Cylinder Compression
Air Cleaner Element
Air Cleaner Duct and Carb Holder Leak (just replace them, well worth it)
Camshaft Chain
Valve Clearances
I think it should also list the Advancer, and check the voltage to you coils. Do a search and you will find LOTS of info on voltage drop to the coils. If you do have a voltage drop the relay mod works but I recommend you actually find and fix the problem instead of just avoiding it.
My bike didn't finally start running really well until I did EVERYTHING....each individual thing helped some, but when I finally got everything correct, it all came together and it runs very well now.
What kind of manual do you have? You need the real deal Kawasaki one, forget the others. Don't ignore any of the listed items, I ignored the throttle cable adjustment because I knew it was correct. Well, it was just about the last thing I did and it made a difference.....coming off idle....just like the problem you are describing.
Gulf Coast, Texas
1977 KZ1000LTD
1984 VF700F
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- Nebr_Rex
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That is placing the e-clip in the next grove down as it sits in
the carb.
.
2002 ZRX1200R
81 GPz1100
79 KZ1000st daily ride
79 KZ1000mk2 prodject
78 KZ650sr
78 KZ650b
81 KZ750e
80 KZ750ltd
77 KZ400/440 cafe project
76 KZ400/440 Fuel Injected
www.dotheton.com/forum/index.php?topic=39120.0
.
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- megadub72
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I just can't seem to find what size the jets are supposed to be anywhere on the internet. I can't find it in my "Kawasaki Heavy Industries" service manual either. Help!
1979 KZ1000ST daily rider
Aftermarket Header 4-1
1980 KZ1300 project
Stock, so far
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- 74ullc
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Hopefully someone else will confirm these jet sizes.
Gulf Coast, Texas
1977 KZ1000LTD
1984 VF700F
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