Fancy a 2+bhp increase for nothing ?

[Warkton Tornado No.1]

Actually, few Forum users outside of track racing would be aware that Mark Ellis built a Group Four with some very pioneering ideas, as I recall. This was quite some time prior to 2010.

He wrote an article (or two) for Scootering magazine in which he outlined some of the features.

Maxton were commissioned to re-valve a Honda RS125 rear shock & his MSC motor used a Keihin PWK, if memory serves.

In the hands of Scott Swarbrick, that bike was unassailable in its class.

[Eden]

Actually, few Forum users outside of track racing would be aware that Mark Ellis built a Group Four with some very pioneering ideas, as I recall. This was quite some time prior to 2010.

He wrote an article (or two) for Scootering magazine in which he outlined some of the features.

Maxton were commissioned to re-valve a Honda RS125 rear shock & his MSC motor used a Keihin PWK, if memory serves.

In the hands of Scott Swarbrick, that bike was unassailable in its class.

people have used Keihin pwk carbs for years, the airstriker is quite different.

[Eden]

A quick search to show the difference, have a read here.
http://www.trx250r.net/forum/intake-fue ... riker.html

basically the A/S has fins in the mouth which non A/s don't have and they are quad vented, they were made to provide better running through 1/4 throttle and I can confirm that they do just that

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 .....

here is a pic of the one on my 240

as.jpg

[Warkton Tornado No.1]

Post by Eden » Wed Jun 15, 2016 5:48 pm

Warkton Tornado No.1 wrote:
Actually, few Forum users outside of track racing would be aware that Mark Ellis built a Group Four with some very pioneering ideas, as I recall. This was quite some time prior to 2010.

He wrote an article (or two) for Scootering magazine in which he outlined some of the features.

Maxton were commissioned to re-valve a Honda RS125 rear shock & his MSC motor used a Keihin PWK, if memory serves.

In the hands of Scott Swarbrick, that bike was unassailable in its class.



people have used Keihin pwk carbs for years, the airstriker is quite different.

You are quite right in pointing out the distinction. I can’t even be certain of what Keihin type Mark used now.

What we need is an editor with unlimited archive access…..

[Eden]

I don't think the air striker was released much before 2010 tbh

[dave411]

A quick search to show the difference, have a read here.
http://www.trx250r.net/forum/intake-fue ... riker.html

basically the A/S has fins in the mouth which non A/s don't have and they are quad vented, they were made to provide better running through 1/4 throttle and I can confirm that they do just that

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 .....

here is a pic of the one on my 240

as.jpg

Shit,thats a lot of hoses

[drunkmunkey6969]

Just in case anyone missed the B4B series in the mag:

Part 1) http://www.scootering.com/scootering-cl ... ng-part-1/

[dave411]

That's interesting.Any chance of putting the rest on?Much better reading them on the big screen

[Mark97]

it was a PJ36mm Keihn - D-shaped and set-up by FW Developments. It made a massive difference when compared to the 34mm Smoothbore PJ Amal.

It was dyno set-up on Christmas Eve by FW Devs - and I won my first race ever - using it 3 days later.

Your comment: "In the hands of Scott Swarbrick, that bike was unassailable in its class" - is pretty accurate to be fair - although I didnt too that bad on it myself to be fair.....