Is this a RB Carb?

[Charl]

Hi All,

Julien spotted this "mod" on the top of my needle tube - I see from pics on the net, its not stock.

Mine:



Stock:



With thanks to E-Dirt for the pic
http://www.e-dirt.co.za/forum/forum_posts.asp?TID=37772

RB:



With Thanks to RB Designs for the Pic

http://www.rb-designs.com/kdx200-220.htm

Anybody know any other features to identify if this carn has been worked by RB? (Other than the dividing plate)

[Charl]

Me again - so been musing on this - the block looks professional done, the carb body is in need of a spit and polish. Conclusion - an RB block somehow mated to a stock carb body? I know that the spray tube is flat on a four stroke, and angle cut on a two stroke, but am unsure what effect this cutout has on performance, and where in the rev range the change is targeted at. Penny for your thoughts...

[Julien D]

Interesting find. I'll take a look at my RB carb and see if that notch is present and get back to you.

[Tedh98]

My RB carb has the notch.

But this carb is definitely not an RB carb and it has the notch:


I'm wondering if that notch is even one of his modifications?

[Julien D]

I am not thinking so. I have come think it's a difference in newer vs older PWKs, after scouring for pics.

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[fuzzy]

Wonder if it's a difference between KDX OEM carb, and a "Retail" carb? They are different.

[Jaguar]

lowering the engine side of that needle tube will make like the mid range is jetted richer.