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Mikuni Jet Issue ?
- BIGKEVIN
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1976 KZ900
2006 ZX6R
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- BIGKEVIN
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1976 KZ900
2006 ZX6R
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- Patton
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Good Fortune!
1973 Z1
KZ900 LTD
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- BIGKEVIN
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1976 KZ900
2006 ZX6R
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The important running sync vacuum manometer readings are NOT while the carb top covers are off.
The important running sync vacuum manometer readings are with the carb tops fitted in the normal running position. Which, ideally, will be equal among all the carbs at idle rpm.
What are your current manometer readings at idle rpm with the carb tops fitted in the normal running position?
When cleaning the smoothbore carbs, an easy to overlook item is removing and cleaning the air jet BS30-97 shown as #12.
Cleaning procedures for the pilot circuit are basically similar among the Mikuni manual throttle slide carbs.
Good Fortune!
1973 Z1
KZ900 LTD
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- Patton
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1973 Z1
KZ900 LTD
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- BIGKEVIN
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1976 KZ900
2006 ZX6R
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- Patton
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Just read it with the caps on.
If the carb vacuum signals are reasonably equivalent at idle rpm, the sync is acceptable.
So don't worry about attempting further sync adjusting with caps off.
The important sync reading is when all the carb caps are on.
What are your current manometer readings at idle rpm with the carb tops fitted in the normal running position?
Good Fortune!
1973 Z1
KZ900 LTD
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- BIGKEVIN
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1976 KZ900
2006 ZX6R
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- BIGKEVIN
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- Posts: 419
- Thank you received: 1
1976 KZ900
2006 ZX6R
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- BIGKEVIN
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- Posts: 419
- Thank you received: 1
1976 KZ900
2006 ZX6R
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- Patton
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- Thank you received: 2098
For purposes of carb sync, it's all pilot circuit.BIGKEVIN wrote: ...Is it possible that the neddle needs to be lowered ? The bike has 120 main jets and 25 pilot jets. Is that correct for a bike with a 4 into 1 Vance and Hines pipe with no baffle and K&N pods ?....
Main jet size has no influence.
Jet needle clip position has no influence.
Would suspect the 25 pilot jet is okay for sync purposes.
Here's a better copy of paragraph 8 from Sudco's smoothbore sync instructions.
Good Fortune!
1973 Z1
KZ900 LTD
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