General > Introductions
88 KX 250
Friar-Tuck:
Hey CC3
The '88 kx 250 did in fact come with the PWK 39 and the jetting specs are as follows as per the Clymer M447-2 pg.334
Main Jet 172
slide cut-away #7
jet needle R1368J 3rd clip position
Pilot 52
Air Screw 11/2 turns out
Float height 15-17 mm
If You can swing it I would Highly recommend the Clymer (its usually cheaper) or a set of service manuals.
Welcome to the site,
Tuck\o/
1989kawasaki:
thats odd that it came with a pwk 39.. mine came with a pwk 38
concave3:
well I have the carb in front of me it sports a 162 main, and a 55 pilot... and I cleaned it all about a month ago and they are still clean I had just forgotten the jet sizes. the clip itself was right in the middle notch, I tried moving it down and the idle was off the wall, so I moved it one up from the middle and it helped a little. the only way that it starts is with the air screw all in or a little out and the idle screw way out... then it idles okay then it starts to die, so i tap the throttle and the rpm's go crazy, I have to use the kill switch so it doesent rev too high... any info would be great on how to keep the idle down on this beast.
Friar-Tuck:
89'r
Yep that's what I see in the clymer, the '88 came with the 39 and the 89 with a 38mm. I know it seems backward, but heck anyone could've swapped out parts either way. I think I'm the fourth owner of my 2k 500 and your bikes have a few years on mine.
It shouldn't be a problem getting the carb tuned close, I should think.
CC3,
I know this sounds corny, but get a notebook and record your settings and jets, and keep it somewhere in the garage.
Before I did this I was constantly buying the wrong jets. Another thing is to see what the bike is doing as far as weather (time of year) and any other maintenance you've done. (guys looking to buy a bike like being able to see this also when it comes time to sell)
I'll look for a few links to help get you on the right track as far as what jets will get you where you want to be.
The Factory has to jet the bike on the fat side to be safe,(heck they end up all over the world) and it would appear your main is lean and the pilot is fat.
I would like to make one thing clear right from the git go.
There are a slew of variables that come into play.
Here are just a few, Weather, Altitude,condition of the engine, modifications,type of riding, how hard the rider is working the engine, pre-mix and ratio etc-etc.. so as much as I would like to be able to say
"Oh Yea, put in a 50 pilot above 70degrees and a 52 below and run a 168main above 70 deg and 170 below and you'll be Good to Go"
I really can't. If you are willing to do a bit of reading and hang with us a few posts I'm sure we can get you close,
and then you'll be surprised at how simple it will be to dial her in.
Here's a link to our Gallery where posted a bunch of stuff.
(You should be able to get the next two pages by clicking the arrow for next at top of the page.)
http://www.kxriders.com/coppermine/displayimage.php?album=267&pos=6
Tuck\o/
concave3:
Well today was the first time I got it offroad and opened her up!... the bike runs absolutely perfect with the choke on :-D
the only problem I had was the plug vibrated all the way to the last threads and when my bro was on the pipe it blew the sparkplug right out of the head :-o I though it blew up but it was fine... I put the plug back on when I got home and it fired right up! I also got my front brakes working...
all in all I love this bike now! blows any 125 ive ever ridden away!
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