All 2st PWK & PWK as

Whats the difference between a stock 38mm pwk and the air striker version?

A standard PWK or Airstriker are not fitted with either of the above
The version on the right is a KTM Airstriker the other just a PWK
Some have the screw on top, some do not

The two little wings in the throat make it an air striker. They tend to have a little better low end manners.

do the fins make that much difference? im a pretty slow rider. mostly ride tight woodland but do quite a lot of steep terrain also so bottom/mid range is where im at all the time.

I have been playing with a 36mm and a 39mm pwk on a wr 125 and have just put a 38mm airstriker on and I can honestly say I have found no bottom end gains with it at all and if anything was a bit of a pain to get rid of a little rich spot at around 1/8 throttle and had to fit a leaner slide to just about clear it up
I must add I was being very very picky and most people would never notice it
I will say that the 39mm with a divider plate (reed side) makes more bottom end power than either the 36 or the 38 airstriker so I have just fitted a plate to that but as its dark outside testing will have to wait till tomorrow

I don't think the little wings do that much. I agree with johnnyboy, the plate in the throat is much better at increasing bottom than the air striker wings, but they don't seem to hurt anything.

BTW; Those are actually PWM series carbs in the picture.

A

Whoops - FAIL!

Stu

Best have a pic of a airstriker then ! now we can all play spot the difference

Does anyone know what the weird shape on the top of the KTM pwk does vs. the screw top? It is just a big hollow space inside. Is there a performance difference?

Its there for no other reason than to fit the tps (throttle position sensor) as fitted to KX 250s yz 250s ect , the slides and every thing else all interchange
I also must say how sorry I am for putting a pic up of a PWM and calling it a pwk ! Im putting it down to a spelling mistake or is it that I am just getting a little senile

It's no big deal. I just got a e-mail from a guy wanting to know where he could get a PWK like that one. with the bolt on top. Just trying to clear thing up.

If you want more top end the PWM is the way to go. I have one on my 250, but I think it would be a much better carb for the 125 than the PWK. Also fits the stock space better. I'm even able to run a reed spacer with it. And they jet up pretty close to a PWK.