I just bought a new Keihin PWK40 Air-striker carb for $67 delivered !!!!!!

[Hoony]

Those will be the Chinese rip off Okos, saw a thread on how to pick them. Real Okos have Taiwanese flag on box is first clue, next is jets actually have markings
Have been running a real Oko for years on my Sherco & it's as good if not better than a Keihin PWK

i never knew of Oko carbs, are they as good as keihins' in general.

[tony27]

Been around for quite a number of years, only have experience of their 28mm d-slide carb, have a couple of the power jet oval bored 30mm carbs which I suspect may be the copies
Early versions weren't known for having great quality chrome on the slides but I haven't had any problems
Main improvement with trials bikes over keihins that have been noted worldwide is less fuel out of the overflows when hopping. I picked up 1 of the clear floatbowls which is quite helpful & really cheap

[John Orchard]

And a 38mm PWK even cheaper, with jetting settings quoted in ad.

  https://www.ebay.com.au/itm/Aftermarket-Carburetor-For-38mm-PWK38-Dirt-KTM-250-250SX-250EXC-TRX250R/132219650996?hash=item1ec8e7c3b4:g:Hb0AAOSwvjdZOLiX

[Momus]

I've fitted a couple of smaller PWK's and found same deal with slow running and pilot passages. Also found that the seal of the jet block and the passage alignment might need a blueprint. These were OKO branded units.

Those will be the Chinese rip off Okos, saw a thread on how to pick them. Real Okos have Taiwanese flag on box is first clue, next is jets actually have markings
Have been running a real Oko for years on my Sherco & it's as good if not better than a Keihin PWK

Yes the OKO carbies with provenance are good and the cheapies easy enough to get right. I am using the sub 30 mm size which are very compact and ideal for smaller 4 stroke fitups. Benchmark for these though is the Keihin FACE.