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running to rich
- canadien
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idle is good air fuel ratio is 13-14:1. Wide open throttle is good ratio is 13:1 with 115 main jets. The problem is cruising at 25mph the air/fuel ratio is 10:1 and at 60mph cruising the mixture is 11.5:1.
I have the jet needles set to the leanest position (the clip is in the top groove) The carbs are synced and fuel level has been set precisely with clear vinyl tubing in the bowls to measure height.
I believe the emulsion tube to jet needle clearance is to great but I can't seem to find a replacement anywhere.
Anybody have any ideas where to get these parts? Or should I just get leaner jet needles? The onea in my carbs are stock 5J9.
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- Patton
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What are metring rods?canadien wrote: ...1974 Kawasaki z1 900...rebuild the carbs, new needle and seat, new metring rods,...
I believe the emulsion tube to jet needle clearance is to great but I can't seem to find a replacement anywhere.
Anybody have any ideas where to get these parts? Or should I just get leaner jet needles? The onea in my carbs are stock 5J9.
Perhaps the needle jet in one or more of the carbs has become enlarged (wallowed out) due to wear.
If the carbs have P-8 needle jets, they are listed at Z1Enterprises:
Click here > www.z1enterprises.com/ItemDetails.aspx?i...73%2f74&item=SIK-648
Good Fortune!
1973 Z1
KZ900 LTD
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- canadien
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- mike1957
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mike1957
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- missionkz
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If you replaced yours with something like this.... yank them out, junk!!
Bruce
1977 KZ1000A1
2016 Triumph T120 Bonneville
Far North East Metro Denver Colorado
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- DGA
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"83 KZ1100 Spectre, '81 Yamaha XV750 Cafe, '74 Kawasaki H2B 750
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- canadien
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- Patton
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canadien wrote: My biggest concern is just off idle at 25mph where its running at 10:1 the spark plugs get sooty and the engine isn't running smooth at that speed.
The pilot circuits are still significantly influencing the mixture at this throttle position.
Could try leaning the pilot circuits by turning each pilot air screw out counter-clockwise 1/8 turn, and repeat the test with pilot air screws turned out 1/4 turn.
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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- canadien
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- SWest
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- 10 22 2014
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Steve
The needle jet was a P8.
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- canadien
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