PWK Airstriker vs. standard PJ

[GPracer2500]

I've got a 38mm PJ on my 85 250r. What might I expect to gain with a 38mm PWK? What about some other size PWK (39mm)? What does the PWK do that the same sized PJ does not?

If I was upgrading from the stock 34mm PE I'd be all over the PWK but since I've already got a 38mm PJ is there any reason to keep my eyes open for a good deal on a PWK??

[NOS_350X]

isnt the pwk just a airstryker carb?? So you get another little screw on the side and thats about it.

[GPracer2500]

That's what I though--all PWKs were Air Strikers. Are the Air Strikers a subset of the PWK line? I looked at Sudco's catalog and they seem to show only the PWK35 and PWK38 are available as Air Strikers (non-A/S PWKs in those sizes are also available). So I guess all PWKs are not Air Strikers [shrug].

What is the function of the extra adjustment on the PWK/Air Stiker? What distinguishes an A/S from a standard PWK?

[Yamahondaman]

PWK ... Came After the "PJ" Oval... the "Oval" Carb. was to replace the "Round" OLD Carb's. .. the reason for the "Oval" is because Mic. had the Patent on the "Flat" Slide Carb. .. the Oval has the Choke Circuit in with the Idle and Allow's fuel to "discharge" after you let off at a HIGH Speed ...Unlike the EXPENSIVE Lectron Carb's ... Later on "They" Came out with the ....... "PWK" ... A BETTER Responsive Carb."because of the back "D" (Flat) Part of the Slide.....( a way to BETTER it because of the Patent ) !! ...
the PWK A/S..."Air Styker" Carb's have TWO Fin's in the Rear Bell of the Carb. for More "MID." Punch ...
the PWK Q/V " Quad Vent " has TWO Extra Hoses Routed up and around each side of the Carb. for the "WHOOPED" Section...the Bike won't "BOG" as Much because of this !!
the PWK-A/S-Q/V "Air Stryker,Quad Vent" is for the Moto-X Racer in Mind ..LOT'S of Low and Hard Mid Punch .....

[GPracer2500]

PWK ... Came After the "PJ" Oval... the "Oval" Carb. was to replace the "Round" OLD Carb's. .. the reason for the "Oval" is because Mic. had the Patent on the "Flat" Slide Carb. .. the Oval has the Choke Circuit in with the Idle and Allow's fuel to "discharge" after you let off at a HIGH Speed ...Unlike the EXPENSIVE Lectron Carb's ... Later on "They" Came out with the ....... "PWK" ... A BETTER Responsive Carb."because of the back "D" (Flat) Part of the Slide.....( a way to BETTER it because of the Patent ) !! ...
the PWK A/S..."Air Styker" Carb's have TWO Fin's in the Rear Bell of the Carb. for More "MID." Punch ...
the PWK Q/V " Quad Vent " has TWO Extra Hoses Routed up and around each side of the Carb. for the "WHOOPED" Section...the Bike won't "BOG" as Much because of this !!
the PWK-A/S-Q/V "Air Stryker,Quad Vent" is for the Moto-X Racer in Mind ..LOT'S of Low and Hard Mid Punch .....

Thank you. Do you (or anyone) have any experience going from a PJ to an equally sized PWK A/S? Worth the trouble?

[Yamahondaman]

i put a set of 35mm A/S PWK's on a BUILT Banshee and the TOP Went Away !!
we sold them on E-Bay and Bought a set of REGULAR PWK 35's and it FLEW !!!!
Mid Range is ALL there GOOD For.... " i can use the Clutch and Gear it for that" !!!

[Pete]

Thank you. Do you (or anyone) have any experience going from a PJ to an equally sized PWK A/S? Worth the trouble?

if I had a 38mm PJ I would spend my money elsewhere. I'm not sure I totally agree with the above assessment of the carbs, but the short end of it is, you won't see enough of a gain for your dollar.

[TtownJoeShow]

i have the 38mm PWK A/S Q/V BUT i havent installed it in either of my trikes. Somewhat lazieness, don't want to put it in then take it right back out if i don't like it lol i mainly bought mine for the 83 300cc 250r but its broke down for a few weeks...the ppl on here told me it would work best on the 85 and to use a 86 carb on the 300cc.

this weekend is callin for +11oC so i might do it then when its warmer...but its hard to say

oh and yes the A/S Q/V only came in 35mm and 38mm (and maybe 28mm?? cant remember)

[Yamahondaman]

this weekend is callin for +11oC so i might do it then when its warmer...but its hard to say

DANG !!! Still in Shorts and T-Shirt Here !!! getting chiily tho !!

[willcamach]

i also have the 38mm pwk a/s q/v and was planning on using it on my tri-z after getting the (phase 2 wrench report) porting done, but sounds like this may be the wrong carb according to what has been posted what do you guys think should i be looking for another carb to use.

[Yamahondaman]

that carb. is a GOOD Carb. i would use it if you allready have it ...

[SpeedBump]

Another unique thing about both the 35 & 38 A/S....they both have two "runners" at the bottom of the venturi. This is supposed to be where the strong bottom and very crisp throttle response comes from. The way it is supposed to work...from what I have read & have been told....the small runners make the size of the air inlet smaller as the slide starts to open. They direct the airflow and give really good throttle response. I ran a 38A/S on one of my old T4s. I currently run a polished 39PWK and wish I still had the 38. I went with the 39 for more topend, but in doing so, sacrificed alot of bottom. My current pipe, (sh1tty FMF) is NOT a topend pipe, so I am basically getting no noticable improvement up top with the 39. If you have a 38A/S, use it just like that warm-blooded sissy said! :lol: As for the QV....I know 35 and 38s are, but I have heard of guys claiming they make a 36 as well. I have had both the 35 and 38s, but have never seen a 36 A/S.

[TtownJoeShow]

i have also heared of the 36, but i'm thinkin its a typo......

So if it is the Q/V that spoils the topend, just plug the 2 extra hoses or choke them some...if its the fins in the ventury, file them down some by the main....gotta b able to find the happy medium!!!

[Pete]

I don't agree with the statement the fins kill top end. They are small fins at that and enhance the bottom and midrange by directing the airflow and increasing velocity through the carb when velocity is typically low (bottom and midrange)

Of course, this is by my experiences with various carbs, 34, 36, 38mm PJ, 38mm A/S, 39mm PWK, 38mm Mikuni TM, 41mm TM, 36mm TMX, 44mm Lectron bla bla bla I've tried almost all of them on the 250R.

[ceaserthethird]

Has any one tryed the 38mm PWK A/S With Q/V ?

Looking too upgrade !

[cr480r]

Has any one tryed the 38mm PWK A/S With Q/V ?

All of the airstrikers that I have seen have the quad vents... I think all of the recent PWK's have the quad vents...

[SpeedBump]

Has any one tryed the 38mm PWK A/S With Q/V ?

Looking too upgrade !
Read the posts...multiple replies said yes. I have, and I liked it better than the 39PWK. You will not likely see a big difference going from a 38PJ to a 38A/S. You may get a little better throttle response, but not going to be a huge difference. What a lot of people see as a big inprovement isn't just from the different design, but it is from being NEW. How many of the old style carbs have like new internals? I have had many 2 strokes, and have never had one with a real "new" looking carb. Hard to get the older carbs dialed in..most seem to wanna surge or not hold a steady idle. Once you go from a 20yr old carb, to a brand new one, of course you will see a huge difference, but I think the fact that the part is working exactly how it was designed, contributes more to that then it being a different style. Going between different SIZED carbs is a completely different story. For the amount of money invested in a new carb...IMO...no reason to NOT upgrade. It makes life sooo much easier owning and tuning a 2 stroke. ;)

[Bryan Raffa]

I went from a 38pj to a 39pwk and I like it, the throttle responce is better and mutch smoother

[Bryan Raffa]

All of the airstrikers that I have seen have the quad vents... I think all of the recent PWK's have the quad vents...


All Airstrikers have Quad vents
Here is a PWK and a brand New PWK QV as you can notice the two vent tubes that come out of each side of the slider.

the QV has diffrent needel,throttle valve,cap,cable adjustment,spring,float needel, vent pipe,anchor plate.