89 Kdx 200 Sr

Fibb

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Oct 30, 2003
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#1
Hi all,

I was hoping that someone may be able to assist with another boring jetting question. Hopefully this one may be more challenging as it relates to a KDX200SR (or 'F' model as we refer to in Aust).

The carb on this bike is the Keihin PE28 and standard settings are:
Main Jet=122, Throttle Cutaway=6.0, Needle=N68K - not sure if this is a Kwaka or Keihin part no, Clip postition=3rd from top, Pilot jet=45

So far so good.........

The bike has the following bolt on mods:
Pro Circuit pipe and silencer, removed airbox lid, probably Boyesen reeds by the time I finish this. Oh and it also runs a Wiseco sleeve and piston (standard size).

Does anyone have initial jetting suggestions or experience with this carb or similar mods? Temperature is normally around 20 degrees C and altitude is usually around 1000 ft but regularly goes up to 6000.

Also, does anyone know whether the jets (pilot and main) from an FCR carb will fit?

Thanks.
 
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#2
You are running the same jetting as I am. I have just leaned down from the standard 125 main jet to a 122.
 

Fibb

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#5
Do most people find when they fit an pipe that they need to lean their jetting?
 
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#6
Fibb,

My expansion chamber has had the lining removed. My silencer has the internals replaced with a perforated straight through pipe.
 

Fibb

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#7
Thanks JPM,

At least that gives me an idea on what jets to buy as a start.