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Adjusting the Needle Height
- OutsiderKZ900A4
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The bike is 1976 KZ900A4.
Thanks again for any assistance.
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- SweetwoodSUP
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'79 LTD 1000
'84 Ninja 900 (Sold, What was I thinking!)
'81 CSR 305 (sold)
'69 BMW R75 (Sold)
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- martin_csr
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Some jet needles don't have the grooves. In those cases small washers can be used to raise the needles. I guess for precision tuning, washers could be used on the type w grooves to obtain a needle setting between two grooves.
Groove numbers. There is a table in the 81 650 manual, which shows a Jet Needle number of 5CN15-4. The "4" is the groove number for the stock placement of the clip. The groove numbers are counted from the topmost groove, 5 being the lowest groove.
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- Patton
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OutsiderKZ900A4 wrote: Is there a good tutorial out there on adjusting the needles on a 1976 KZ900? I have never had a bike that had the carbs linked together in the manner that these are. It acts like I need to raise them up a notch to richen up the midrange a bit. Any help would be appreciated as the factory shop manual doesn't help much in this aspect.
The bike is 1976 KZ900A4.
Thanks again for any assistance.
Before attempting any carb adjustment, and if not already done, would assure that the carbs are as-new clean, especially the pilot circuit.
Perform a proper bench-sync, being sure to allow ability to further drop the throttle slides when performing the later running-sync.
Adjust valves. Install new spark plugs. Assure ignition timing is spot-on.
Install a new aftermarket in-line fuel filter in each fuel line. And don't let any gasoline enter the freshly cleaned carbs without first passing through the in-line filters.
Then, after all the above, perform the running-sync. And set pilot air screws for best idle.
Test ride to decide whether or not any further carb adjustment might be indicated.
Good Fortune!
1973 Z1
KZ900 LTD
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- SWest
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- 10 22 2014
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Steve
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- gd4now
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- Denco where did you go?
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At low throttle opening 3 to 6%
At mid throttle opening 5 to 8%
At wide open throttle 1 to 2%
1977 KZ650 B1
Pods and Denco header
OLD KAW OWNERS SMILE ALOT
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- OutsiderKZ900A4
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- SWest
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If you had a manual you wouldn't be asking this. I suggest you get one. Sometimes the carbs are switched. It helps to show pics of what you have.
Steve
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- OutsiderKZ900A4
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- OutsiderKZ900A4
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- missionkz
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Then you can just pull the arms with the slide all the way out. Easy to remove the two little screws that hold the arm assembly cap to the slide and pull the needle out.
Bruce
1977 KZ1000A1
2016 Triumph T120 Bonneville
Far North East Metro Denver Colorado
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- SWest
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This way you can do it in the bike. The carbs need to be synced anyway but one at a time isn't as drastic.
Steve
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