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Jetting for Keihin carb
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B. Sanders
Posted 2013-08-21 9:01 PM (#16737)
Subject: Jetting for Keihin carb

Posts: 7
Im curious what everyone runs for a main jet in the stock honda with the Keihin carburetors.
Im currently running a 175 and it seems really rich. Can any provide some ranges i should try to improve performance?

My engine is a 2001 if that makes any difference.

Edited by B. Sanders 2013-08-21 9:02 PM
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Curtis Ruth
Posted 2013-08-26 12:41 PM (#16745 - in reply to #16737)
Subject: Re: Jetting for Keihin carb

PKRA Champion

Posts: 1069
Location: Glendale,AZ
It depends on many factors.

Fuel system type

Carb size/ style (PWM38 / PWK 38)


Stock or mod motor

Many things.

Typically good starting point on Keihin PWM 38 is DGJ needle at P2, 168 main jet, 55 pilot jet, 1 turn out on the air screw.

But as I said, there are alot of factors that can change the baseline.
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