KDX 200 white smoke and bogging??

[Green Hornet]

What ever you prefer. As long as its a good quality. I would try synthetic

 

[matt_60033]

i had a similar problem with my kdx250 and i kept fouling plugs and heavy smoke no bog but i tried all of that but i bought a new muffler and took my old one off and apart and my old one the packing was soaked in oil so maybe your pakings bad

 

[nooch13]

hmmm, yet another possibility! Hey, is that crank seal a possibility too? I was told that on another forum, but nobody mentioned it here...

 

[Green Hornet]

:nod:

hmmm, yet another possibility! Hey, is that crank seal a possibility too? I was told that on another forum, but nobody mentioned it here...

Thats in a discussion about an electrical problem

 

[nmilne]

A crank seal is a possibility, although a rather unpalatable one. I'm assuming that kawasaki were half way bright and made the seals replaceable on the KDX? I had a crank on my KR-1S which was in pretty average shape but could only replace the outer seals, not the inner ones ... so had to get a more decent looking crank from a wrecker (not such a bad thing since the original crank had one of its rod big-ends peeled open like a bananna after I started looking anyway).

When you run your bike for a while, how does the gearbox oil look? Is there any milkyness to it? Thick white smoke is something you'll likely see with a crank seal.

 

[Green Hornet]

Here's another site regarding plug colors. This one has lots of pics for those of you who don't like big words :nener:

http://www.dansmc.com/Spark_Plugs/Spark_Plugs_catalog.html

 

[nooch13]

ok, I think I found the problem. I tore down the carb and found that the c-clip that holds the needle in position was broken off and the needle was all the way down and bent...Now I just have to find a parts store open on Sundays!

My jet sizes are as follows 58, 155, 172

Is that ok for 5k altitude and up??

 

[nooch13]

OK, I need a new needle jet. This one has a slight bend to it that I can not straighten out. The local bike shops of course have none in stock. Any ideas on where to get my hands on one, and is a 172 jet an ok size?

 

[Green Hornet]

Your local bike shop will have to order you a new one. Try the new needle before changing the other jet. Look at the JUST KDX Page and goto the Carb Tuning Link. You will find a graph there that will give you a good approximation for temp & feet above sea level. :nod:

 

[nooch13]

ok, this may be a dumb question, but could you link me to the just kDX page?? Never been there...

 

[captbly99]

ask and you shall receive:
http://justkdx.dirtrider.net/

:cool:

 

[andrew]

delete comments - just noticed he's talking about a 1990 model...sorry!

 

[G. Gearloose]

My jet sizes are as follows 58, 155, 172

Is that ok for 5k altitude and up??

I suspect, most definitely no.

 

[canyncarvr]

Bookmark this:

http://www.buykawasaki.com/site/VIVehicleInformation/VIChooseVehicle.asp?intCatalogID=2&intParts=1

Take note this is NOT the 'front page' of the site..but the info lookup page per make/model/year.

From this site you can find that the stock jetting for your bike is 48/150.

re: 'My jet sizes are as follows 58, 155, 172'

No they aren't. You don't have three removeable jets...only two..pilot and main. In any case, if any combination of those jets are in your bike, it is so far off you can't even SEE your bike from here (probably due to all the smokin')!!!


re: Is this ok for 5k+el.

What Gearloose said.


A premix ratio change to 40:1 from 32:1 is making your air/fuel mixture more rich, making an already bad situation worse.

In the 'Every KDX rider should read this...' stickied to the top of this forum you (and everyone else) will find a link to Canadian Dave's website. I would suggest that every KDX rider read it. ...for all of you that haven't asked, consider yourselves to have received anyway.

re: Can a bad crank seal cause this problem (smokin').

Yes.


A change in plug heat range to address a poorly jetted bike is for sure a misstep in the wrong direction.


A 'needle jet' and a 'jet needle' are two different things. A jet needle fits inside the needle jet. The jet needle sits inside the throttle valve. Most Keihin carb needle jets are not replaceable through average means. Keihin needle jets are rarely changed/tuned for that reason.

There is an altitude jetting compensation chart on CDave's site.

Cheers!

 

[nooch13]

Thanks for all the advice, it is GREATLY appreciated. I do have what I think is a needle jet. I took it out and attempted to find a replacement as there was a slight bend to it. It was stamped with 172 on it, that is where I got the size from. No luck on finding a replacement locally though. I am going to re-jet this afternoon. I was out of town over the weekend. I'll let you all know how it goes!

 

[Jackpiner57]

Be sure to clean your air filter, put in a new plug, clean out your exhaust system, install a new needle and open up the airbox (airbox modification) before attempting to re-jet your bike. Like CC said, I would not go to a hotter plug. If you foul the one you put in, put in another new one and continue re-jetting. Buy a few new plugs for this endeavor.

 

[yankeefan4life72]

It was stamped with 172 on it, that is where I got the size from.

IF it is a jet needle, are you sure thats not 1172?

 

[nooch13]

I can not be positive as it is not right in front of me, but I have the number R172N in my head for some reason...I did not tear the carb down last night as planned, went to dinner with the wife instead, I will try to get it done tonight after softball...

 

[andrew]

That's the needle mate, R1172N...yes you can replace those. I believe Sudco over there has them. Also see the jetting guide on JustKDX for a conversion guide to Keihen needles and more advice about effects different needles have.

Andrew

Andrew

 

[nooch13]

thanks, I am learning as I go here! Pretty easy once you have the base knowledge to work from...