OzVMX Forum
Marketplace => eBay Finds => Topic started by: John Orchard on November 10, 2017, 01:44:08 pm
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It took a week to arrive, it looks perfect 8-)
https://www.ebay.com.au/itm/Aftermarket-PWK-40mm-Carburetor-For-PWK-KEIHIN-motorcycle-universal-scooter-carb/132219660560?hash=item1ec8e7e910:g:tUcAAOSwyltZOLx8
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Pilot & main jet are non genuine #42 & #160
Needle & slide not marked.
For $67 I'm happy to experiment :-)
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i have heard both good and bad reports of the chinese copies, the face book gropus for CR500 riders can help you out if needed.
is it for your 84' CR500 ?
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Yep, thought I'd give it try.
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Actually, you didn't buy a KEIHIN PWK air striker for $67 delivered...........you bought a lump of cast alloy that looks like one.
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see the same thing with chinese weber carby copies. cheap as and sort as advertised as webers...but arnt. nothing interchanges and lots of stripped threads, misalinged bits etc. good luck, bargain if it works.
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I haven't had an experience with them,
I wonder if they can be saved and set up to take Genuine Jetting components Husky 85? as per Hoony's lead?
Think I will join the FB groups for CR500 riders.
Keen to hear your results John.
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Damn...I got ripped orf..!
I paid 89 delivered, or there abouts. Swapped everything I could for genuine parts including top cap...but only because I had the parts to do so..I'm running it on a husky 390, stock rebuilt ignition and with the last two test rides it's as good as expecting has allowed..starts easy..Im not complaining yet.
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I bought a 38mm PWK for $57 delivered, just to have a look at it. It's really, really hard to pick it from a genuine one. I'll be interested to try it on something to see how it goes.
K
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Just spoke to a guy who has about 5 of these on various bikes. The only problem he's had has been a couple have had the pilot jet bleed hole blocked or too small. He now re-drills them as a matter of course & has had no problems since. Uses standard Keihin jets.
K
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Just spoke to a guy who has about 5 of these on various bikes. The only problem he's had has been a couple have had the pilot jet bleed hole blocked or too small. He now re-drills them as a matter of course & has had no problems since. Uses standard Keihin jets.
K
The pilot outlet into the venturi?
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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.
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Yes, the pilot outlet into the venturi.
K
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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
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The pilot & main jets are marked with the size but it is not stamped in, looks laser etched?
I've measured up the supplied unmarked needle, it corresponds with Keihin number CGM, or R1371N. The R1371N was a needle supplied stock in the '87 TRX250R and an option for '88 KX500 and '88 & '89 KX125 & 500.
Haven't determined the slide cutaway yet, can't find any information on how to correctly do that yet :-)
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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.
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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
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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
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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.