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Post by ryan_ott on Oct 16, 2015 11:31:29 GMT -5
I don't see why not I wouldn't be surprised if they are the same carb just relabeled. What is your needle labeled as?
Edit: I meant same as the OKO and Koso type
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Post by PIG on Oct 16, 2015 12:30:56 GMT -5
I'm sure a Keihin needle would work, but like Lucas said I highly doubt there just rebranded. My best guess is they're the Koso knock off brand, just like S6 and Voca use.
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Post by iwiketuddlz on Oct 16, 2015 15:24:50 GMT -5
I recently got teh JJH needle from jetsrus and holy crap what a difference it made!! I hade no clue the importance of the needle taper ect ect
Wooot
Braaaaaaap
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Post by spaz12 on Oct 16, 2015 15:48:11 GMT -5
 How's the Polini PWK's? I got a screaming deal on one when I got my cylinder. Dunno, don't use them and probably never will...but they're not from the Keihin factory thats for sure.... Looking at the Polini PWK they seem to look just like one of those copies where there are so many of. Most of the times you can immediatly see if a PWK type carb is a genuine Keihin or not. The material has different color, casting details are different, the part that goes into the intake boot looks different. Some of them copies don't have a powerjet and some are in a size that Keihin doesn't even produce (24 and 21mm). I don't know why a brand like Polini sells (replica/copied) carburetors when there are high end competitors like Kehin of Mikuni. Fuel metering systems are just too much of a specialty. And i don't think Polini can make something better out of a stock TM or PWK carbs and sell them cheaper as a Stock PWK or TM. Polini sells cheap replica's if you ask me. I wouldn't buy one. You know, fuel metering is such a important factor in two strokes...you want to rule out all possible problems there. I only use genuine carbs and only use Dellorto, Keihin or Mikuni because they have carbs in their portfolio for every possible application. You don;t have to look any further than those three manufacturers. 
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Post by spaz12 on Oct 16, 2015 15:50:10 GMT -5
Anyone wanna buy a Polini pwk ?
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Post by Lucass2T on Oct 16, 2015 17:10:23 GMT -5
I think a lot of ppl are very happy with their non Keihin PWK's (sounds quite downgrading this)...And for hobby use they're probably okay. But im saying i wouldn't use them.
I would rather have an old outdated but well developed, tested, trusted and proven roundslide (Keihin PE or Mikuni VM) carb over a chinese PWK copy (because thats what most of em probably are).
The thing is...when i can't determine or check on forehand if a part will work like it should or maybe it's little of very questionable, i just go with the thing i'm sure can trust. I can't check or test how a chinese carb meters fuel in various situations, if all the small passages are drilled well and if all the plugs are airtight. I don't want any unwanted surprises that can lead to engine failure.
Same goes with crankshafts and bigend bearings. I can't balance cranks or press conrods so i let a pro do it. And i would never dare use a stock crank or conrod on my setup because i can't check on forehand if it will fail or not. Then i'll just go with something im sure of won't fail. Rather overkill there than a 'kill' where your engine gets killed due to parts that do things you don't want.
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Post by 190mech on Oct 16, 2015 18:47:36 GMT -5
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Post by spaz12 on Oct 16, 2015 19:05:50 GMT -5
Well, they do use them on their Thor (aircraft) engines, so they must be pretty good fakes. I'll keep it for now and if I have problems tuning it then I'll get a Keihin.
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Post by katastroff on Oct 16, 2015 19:41:49 GMT -5
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Post by Lucass2T on Oct 17, 2015 2:35:18 GMT -5
Well, they do use them on their Thor (aircraft) engines, so they must be pretty good fakes. I'll keep it for now and if I have problems tuning it then I'll get a Keihin. Yeah they're probably quite okay but paramotor engines don't have to vary in revs that much as a roadmachine or MX bike does. And the more the revs change...the more important the carb becomes. But the genuine $250 Keihin PWK being the standard... and the Polini PWK being 3 times cheaper! It can only be worse than that standard. |
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Post by PIG on Oct 19, 2015 20:59:22 GMT -5
Radiator showed up today, and looks to be really well built. I also made a deal on a new old stock Keithin PWK 28mm from a Honda CR85. The cylinder and water pump still havn't shipped as they're back ordered  . Probably won't see those for a month I'd guess. |
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Post by spaz12 on Oct 19, 2015 21:06:09 GMT -5
Gonna be another awesome build here! I'll grab some popcorn and have a seat to watch this one   |
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Post by PIG on Oct 19, 2015 21:15:51 GMT -5
Now I gotta make this thing fit in there some how without it looking like a hack job  |
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Post by PIG on Oct 21, 2015 0:45:51 GMT -5
I'm wanting to buy a main jet and pilot jet kit so I have what I need when all this stuff arrives. Whats a ball park guess of what my main jet and pilot jet might be with a Keihin PWK 28mm carb with an open air filter/pod filter? I just don't want to buy the wrong range of jet kit. The cylinder will be a Metrakit Pro Race 3 with either a C16 or C21 pipe.
Thanks
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Post by spaz12 on Oct 21, 2015 0:59:38 GMT -5
With the C21 I would start with a 170 and work down. I'm pretty sure that'll be rich. Almost positive it'll be rich. That jet would be good start with a C30 on an mhr 77 and open filter.
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. Probably won't see those for a month I'd guess. 
