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Author Topic: Keihin PWK 39 at 145 altitude  (Read 1273 times)

Offline Frank

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Keihin PWK 39 at 145 altitude
« on: October 20, 2012, 12:51:28 am »
I want to buy a Keihin 39PWK in europe (cheaper shipping bill) for me!
my question is anybody knows what the jetting spec is on c.k. 145 altitude?
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under-steers is when you see the tree the goes in. overrides is when you hear the tree which you were going on.
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Offline Mitch Keller

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Re: Keihin PWK 39 at 145 altitude
« Reply #1 on: October 20, 2012, 10:02:55 am »
Franks thank you for asking this, I am wanting to set up a spot in Tech Talk on Carburetor jetting asking members to post make of what quad, year, mods to engine, carburetor, size, what slide, what needle, clip location, pilot size, main jet size, air screw turns, with elevation and location, this would help out  so many members get into the "Ball Park" on jetting.
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Offline Rogue1970

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Re: Keihin PWK 39 at 145 altitude
« Reply #2 on: October 20, 2012, 11:08:22 am »
Yes, doing this again at least gives the other members a ballpark idea on what to shoot for.
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Offline Frank

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Re: Keihin PWK 39 at 145 altitude
« Reply #3 on: October 20, 2012, 01:35:42 pm »
i think the best way to find out our starting point to start the monster is that you know what is my altitude ?
when engine is running
you can start the finetuning for the mods that you have on your Quad.

i have an oem mikuni 38  flatside  main jet is 360 and the pilot is 1,5  at altitude 145 m oversea
this setup is maybe good running and start cold very well 1kick
think the engine needs more air and fuel on the top rpm's
keihin pwk is maybe the best and cheapest for powerfull ride anytime judt i need the setup for alt 145 m.
Frank

i have a little clip of mine how to start the zilla cold
how can i add this ?
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under-steers is when you see the tree the goes in. overrides is when you hear the tree which you were going on.
"Walther Röhrl "

Offline Gillio

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Re: Keihin PWK 39 at 145 altitude
« Reply #4 on: October 20, 2012, 03:13:02 pm »
Upload it to youtube
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Offline BadMoonRacing500

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Re: Keihin PWK 39 at 145 altitude
« Reply #5 on: October 20, 2012, 05:52:45 pm »
Frank, what pipe and reeds? They will change your base jetting.
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Offline Frank

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Re: Keihin PWK 39 at 145 altitude
« Reply #6 on: October 20, 2012, 11:24:16 pm »
oh sorry
i thought the man looks in the pics.
bore : 87,50
pipe : Paul Turner
silencer : Fat Boy then a mod silencer Opel City 60 HP
reeds: VForce 3
carb: oem 38 Mikuni stock needle , on the second from above, 360 main, 1.5 pilot jet, air screw 2 out
no porting
altitude: 145 m oversea
the idle dies after 30 seconds
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under-steers is when you see the tree the goes in. overrides is when you hear the tree which you were going on.
"Walther Röhrl "

Offline Frank

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Re: Keihin PWK 39 at 145 altitude
« Reply #7 on: October 21, 2012, 01:49:29 am »
<iframe width="420" height="315" src="http://www.youtube.com/embed/wgl1H2CnlD0" frameborder="0" allowfullscreen></iframe>
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under-steers is when you see the tree the goes in. overrides is when you hear the tree which you were going on.
"Walther Röhrl "

Offline Hotbutta

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Re: Keihin PWK 39 at 145 altitude
« Reply #8 on: October 21, 2012, 04:34:31 am »
Along with the Iron Cross, you guys must have iron soles in your sneakers. I can't do that on mine.  Also you are lucky to be  able to street ride.
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Offline Gillio

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Re: Keihin PWK 39 at 145 altitude
« Reply #9 on: October 21, 2012, 07:39:14 am »
I would love to ride my 2-stroke on the steet, well legally I guess. lol
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92 LT250R- Bartlett racing prototype big bore. Wide, Low,  and studded

91 LT250R Mickey Thompson stadium racer

87 LT500R- Mostly stock

89 LT500R IceZilla, mods TBA

Offline Frank

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Re: Keihin PWK 39 at 145 altitude
« Reply #10 on: October 21, 2012, 08:15:33 am »
is not so cool , i can drive on the Autobahn , but nowere els where  C:-) C:-) C:-) C:-) C:-) C:-) C:-) C:-)
can one tell me how can i jetting my keihin at alt 145 m ?

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under-steers is when you see the tree the goes in. overrides is when you hear the tree which you were going on.
"Walther Röhrl "

Offline Dezsled

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Re: Keihin PWK 39 at 145 altitude
« Reply #11 on: October 21, 2012, 09:07:57 am »
Here at sea level +/- 100' , 88 cyl &head stock
39pwk , 185 main, 60 pilot, 6 slide, dgh needle, clip in the middle, 1.5 air screw,
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Offline El Diablo

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Re: Keihin PWK 39 at 145 altitude
« Reply #12 on: October 21, 2012, 03:47:17 pm »
Guys, 145 M is roughly 450 feet. Give or take a few feet.
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Offline Frank

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Re: Keihin PWK 39 at 145 altitude
« Reply #13 on: October 22, 2012, 09:46:30 am »
thanks mutch el diablo  +k2
i think it's the same numbers of jets from Mik to Kei ?
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under-steers is when you see the tree the goes in. overrides is when you hear the tree which you were going on.
"Walther Röhrl "

Offline El Diablo

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Re: Keihin PWK 39 at 145 altitude
« Reply #14 on: October 23, 2012, 10:54:59 am »
Frank, the Mikuni & Kehin carburetors take different styles of jets with different numbers. We are collecting more information on carburetors & jetting and are posting this on a standard  format sheet found elswhere here in the forum. Hopefully someone here has a combination similar to yours that rides at or near the same altitude.    D?
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Brian
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1990 Suzuki LT-500R
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