I just bought a KDX200

[scott411]

May be its part number, 323-728-5407 (P/N 021532). Jet block O ring.

thats not a kawasaki part number,

[nzspokes]

thats not a kawasaki part number,

Im getting the feeling Kawasaki dont sell it. Still looking.

Its this,

[nzspokes]

Found it, will have to import it. May get a few.

http://motocomp-online.com/keihin-pw...ck-gasket.html

[scott411]

Found it, will have to import it. May get a few.

http://motocomp-online.com/keihin-pw...ck-gasket.html

ok, never had to get one for a KDX200, but i remember one of NZ top riders had a weird bogging/dieing issue with a KX125 in 96, which an a similar carb, and this was the issue in the end, the screws to take this apart are unusual as well,

[nzspokes]

ok, never had to get one for a KDX200, but i remember one of NZ top riders had a weird bogging/dieing issue with a KX125 in 96, which an a similar carb, and this was the issue in the end, the screws to take this apart are unusual as well,

Its a security torx, nothing hard. US fourms show this to be a common problem. Little surprised Kawasaki dont do them.

Will try Alec at SME to.

[scott411]

Its a security torx, nothing hard. US fourms show this to be a common problem. Little surprised Kawasaki dont do them.

Will try Alec at SME to.

not unusual for Carb parts, (and sometimes suspension parts) for the manufactuers not to do every part,

Alex would be your best best locally,

"comman problem" is not a term i would use for this o ring to go, having only come across it once in 20 plus years of dealing with PWK carbs on dirt bikes,

Internet forums can sometimes overdo a problem that's not that comman, but it is good to get stuff to check when you searching for an issue,

[nzspokes]

not unusual for Carb parts, (and sometimes suspension parts) for the manufactuers not to do every part,

Alex would be your best best locally,

"comman problem" is not a term i would use for this o ring to go, having only come across it once in 20 plus years of dealing with PWK carbs on dirt bikes,

Internet forums can sometimes overdo a problem that's not that comman, but it is good to get stuff to check when you searching for an issue,

Alec doesnt do them. I do wonder if I can just replace the little round o rings to see if that helps.

It would seem to explain my rich running with fairly standard jetting.

[scott411]

Alec doesnt do them. I do wonder if I can just replace the little round o rings to see if that helps.

It would seem to explain my rich running with fairly standard jetting.

i worn needle would explain it too, or worn reeds i just have not seen those o rings give problems so i am skeptical,

if you can get it apart, maybe to inspect if fuel or air is getting past it, but they are not really made to take apart, so it may do more damage taking it apart,

we used to run 155/42 in most of them from memory, does it have a standard reed block in it, as boysen rad valves were semi popular mods for them, and from memory they needed to be jetted leaner with them,

[nzspokes]

i worn needle would explain it too, or worn reeds i just have not seen those o rings give problems so i am skeptical,

if you can get it apart, maybe to inspect if fuel or air is getting past it, but they are not really made to take apart, so it may do more damage taking it apart,

we used to run 155/42 in most of them from memory, does it have a standard reed block in it, as boysen rad valves were semi popular mods for them, and from memory they needed to be jetted leaner with them,

Needle looks good but happy to replace it. Is there a better one to use than the stock one?

Reed block is stock but have just put Boysen reeds on it. Have not ridden it with them in.

Ive got 155/42 in it.

[scott411]

Needle looks good but happy to replace it. Is there a better one to use than the stock one?

Reed block is stock but have just put Boysen reeds on it. Have not ridden it with them in.

Ive got 155/42 in it.

try it with teh reeds, depending on use it may be an issue, i would try it with the new reeds before trying something else,

where is the bog? throttle position wise?

[scott411]

we did not change needles unless it was major mods, usually incl a rad vavle, and more compression,

[scott411]

good page for Keihen tuning,

http://www.carbparts.com/keihin/need..._your_carb.htm

float levels is something than can cause issues as well,

[husaberg]

Needle looks good but happy to replace it. Is there a better one to use than the stock one?

Reed block is stock but have just put Boysen reeds on it. Have not ridden it with them in.

Ive got 155/42 in it.

google the spooge CR500
I am picking you have a worn needle jet with is a common issue with older Keihins the round hole wears oval unlike the Mikuni karbs its not a replaceable part so you have to use a thicker needle to compensate
The band aid cure for the CR500's is a CR125 needle that leans up the midrange I have done it and it works a treat. The proper cure of course is a new carb.
Google should be able to find you a specific recommendation of a worn needle jet on the KDX200.
the symptoms are a mid range richness and excessive smoking and oily pipe plus narrow power range top end is unaffected but it makes the bike peaky.

[nzspokes]

google the spooge CR500
I am picking you have a worn needle jet with is a common issue with older Keihins the round hole wears oval unlike the Mikuni karbs its not a replaceable part so you have to use a thicker needle to compensate
The band aid cure for the CR500's is a CR125 needle that leans up the midrange I have done it and it works a treat. The proper cure of course is a new carb.
Google should be able to find you a specific recommendation of a worn needle jet on the KDX200.
the symptoms are a mid range richness and excessive smoking and oily pipe plus narrow power range top end is unaffected but it makes the bike peaky.

Yup that sounds just like it. Will pull the carb and see if I can see what it looks like.

[husaberg]

Yup that sounds just like it. Will pull the carb and see if I can see what it looks like.

there likely won't be much to see it only take a very small amount of ovalisation (yeah I made up that word)
Sign up to the CR500 riders site pretty sure the thread was called the dreaded spooge. It was a good informative read.