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Joined
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Hi
I Have a KX125 2004 with a pwk airstiker 38, have som jetting issues...
Engine specs
Bud Racing top
Boyesen intake
Mildly ported
Pro circuit
Aspen R 102
I cant get the bike to run good on low throttle.
Went from 38/160 #7slide step by step to 65/190 #7 slide, the bike runs ok but not good.
No airleaks and newly built engine.
I Have a KX125 2004 with a pwk airstiker 38, have som jetting issues...
Engine specs
Bud Racing top
Boyesen intake
Mildly ported
Pro circuit
Aspen R 102
I cant get the bike to run good on low throttle.
Went from 38/160 #7slide step by step to 65/190 #7 slide, the bike runs ok but not good.
No airleaks and newly built engine.
The Shop
Not sure you should go that rich though, but it does look like you've gone mega rich on the jettinf to compensate for a lean slide.
www.dragonfly75.com/moto/carbjetting.html
The throttle is marked 65, is it the slidenumber?
The needle is marked DGN.
/ Wangstedt
World Championship testimony: Thomas in the Nethlands wrote about the results of using my jetting calculator:
"Just some nice input about the bike (1965 Husqvarna 360 piston port with a Mikuni 32) that I sent you info on earlier and you corrected my input, and sent new corrected one to me, and where red line was rather straight and nice. I was just informed that that bike (driver said jetting was great on the sand track) was one of the bikes in the Swedish team winning world championship in Netherlands yesterday (Sept 21 2019) for vintage bikes before 1965 and driver was over 72 years!"
Pit Row
"This software works very well for carb jetting. It gets you into the ballpark and is almost spot on first time. I setup 2 bikes (CR250 and a CR500) with it and afterwards only had to do some minor adjustments with the air screw. Keihin PWK 38mm Airstrikers on both bikes. It helped in the selection of the needle, main, and pilot. You could try different combinations and it would show you if the combo was too lean, rich, or on the money. I took what I learned from the information and put it into the bike and it worked very well."
JD jetting red needle taken down 0.1mm or else it wouldnt run at all.
Got the #6.5 slide 45/180 jetting.
Tested the #5 slide aswell but it didnt work, the bike keeps bogging.
Getting kind of tired of this and got no ideas. have like 1 hour on this bike the whole season.
Still no leaks and the exhaustvalve works as it should
What JD jetting kit did you get for your bike ? The small bore JD kit should have needles that have scribe lines under the last clip groove, if not you may have the wrong needle kit.
I might have the wrong kit then...
Ill get back to you.
Its the PWK Airstriker 38mm QAS Shortbody
So I ordered the CCL now.
Hope this will work
Thank you !
If that is a little rich at low throttle positions ( 1/4 to 3/8 ) then go to the NECJ.
I'd start with the 175 main. It might be a little rich but it's safer to start on the rich side.
Im running 45/180 because 170 & 175 is to lean on the full throttle.
Thank you so much for the help!
Regards
Christopher
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