oil issue ?

[briank1542]

Hello forums are new to me but I have A 96 kdx 200 it smokes more than I would like the top and bottom were rebuilt 3 years ago than sat for 3 years I use yamaha r lube 45-1 do they all smoke prior to this bike I have just worked on vintage stuff thanks

 

[Kaleel]

They're all gonna smoke the only question is how much. My '01 used to smoke pretty badly but it was running way lean. It was spitting a bunch of black sludge out of the back pipe and it didn't matter what pre-mix I used.

I bought and installed a Rad valve, went two sizes lower on the main jet and put the carb needle clip to the center position and the sludge problem is literally gone.

As a result I'm getting much less smoke. Try leaning the mixture out by adjusting the carb needle. If that doesn't work then you might want to try a leaner main jet or a combination of the two.

Good luck.

Mike

 

[kennedy]

hey, I'm having the same sludge problem on my 98. when you say two sizes lower on the main jet, do you mean a lower number? I'm pretty sure my needle clip is already in the center. I have a fmf pipe and silencer. I'm running klotz techno plate at 40-1. how much effect do you think the rad valve had? thanks

 

[Blink-182]

read it all http://justkdx.dirtrider.net/carbtuning.html

 

[kennedy]

thanks for the link, i read thru it briefly, i happened to have a 155 main jet so i put it in to replace the 160 that was in it. I live too close to town to do a real plug check but i noticed at wot in 6th there was like a miss. the old plug was very oily. it is still spraying sludge out but i'm sure the silencer is dripping with oil.

 

[Blink-182]

i dont know if you have any pro circuit pipes but neither do i have fmf pipes i used this chart to get me along the lines of crisp jetting it made a HUGE differnence in power everywhere i was jetted way to rich you could use it as a starting point http://www.procircuit.com/jettingspecs.htm#1996

 

[kennedy]

so did you use a 145 main and 45 pilot for a 220 or a 160 and 48 for a 200? I have fmf pipe and silencer. I have a 200, set up like the fmf specs say and it is way to rich I guess.

 

[kennedy]

i put in a 45 pilot and a 150 main and no more sludge on the fender! I feel like an idiot tho for not doing it sooner. it's also got a little more of that great 2 stroke snap in the power band.

 

[briank1542]

I learned A bunch from the responses thanks very much, but I am still having A smoke problem I am going to try A 140 main and A 42 pilot I ride about 2500-4000 feet also 1 colder on the plug ? the mix is 45-1 yamaha r-lube maybe just the wrong oil? I can live with some smoke I have A kx 125 which smokes A little but not A cloud