Air/Fuel adjustment on rejetted carb? - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 6 (permalink) Old 10-06-2010, 11:14 AM Thread Starter
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Air/Fuel adjustment on rejetted carb?

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post #2 of 6 (permalink) Old 10-06-2010, 01:45 PM
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Originally Posted by FlacoLove View Post
Question: How do I adjust air/fuel mixture on carbs that have been rejetted? I noticed the information on adjustment of idle/air/fuel mixture covered here/manual & Verses pertain to standard un-jetted carbs. Is it the same for rejetted carbs? My carbs have been rejetted by mechanic back in June. (aftermarket pipes, 1988 VN750). Is adjustment the same? And with 2 cylinders, when and how do I know when I've got the proper adjustment? Thank you's
the procedure is the same .To tell if you are getting it right The best way I have found is reading the plug color you are looking for a light tan color on the insulators around the center electrode.




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post #3 of 6 (permalink) Old 10-06-2010, 03:47 PM
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Start your engine, warm it up to normal temp. Turn the air screw in until the engine rpm starts to drop. Turn the air screw out until the engine rpm starts to drop. Back it up to the middle of the two points (rpm drops). This method should give you a good burn.

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post #4 of 6 (permalink) Old 10-06-2010, 11:35 PM Thread Starter
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post #5 of 6 (permalink) Old 10-07-2010, 03:57 AM
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Don' worry, you'll find the sweet spot were you are happy with your motor.

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GL1100 front fender
OEM engine guard
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Back Rest-Igloo 6 pak cooler
WalMart Saddle Bags
R/R Relocate
Dry Splines Lubed
AGM DieHard-Sears
Gutted Goat
Sporster XL Mufflers
LED's-stop,tail,turn,marker
Pickup coil mod to .45mm
Silverstar headlight
Rotella T6
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post #6 of 6 (permalink) Old 10-07-2010, 07:37 AM
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my uneducated opinion is to do everything else first then fiddle with the black knob...then the black knob, I think owner's manual says it should be between 1050 to 1150. I hope i didn't lead you the wrong direction, but I know I remember seeing this in the OM.
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