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PWK questions
Posted: July 22nd, 2009, 9:54 am
by yota
I searched and read, including Bob's sticky's but I'll jump in with a couple of questions.
I'm considering putting the PJ from my 500 on my 490 maico and putting a PWK 38 on the 500.
are all PWK's air strikers?
I'm all about low end and mid so I am thinking the 38 or 39 is all I need, no dunes or any wide open stuff here. Is this a correct assumption?
my understanding is not to expect any miraculous power increase (which I don't need anyway) but maybe a cleaner throttle response.
damn I sold dredge a 38 airstriker from a KTM 125 I parted out for peanuts a couple of years ago ):
Re: PWK questions
Posted: July 22nd, 2009, 12:34 pm
by lewisclan
yota wrote:I searched and read, including Bob's sticky's but I'll jump in with a couple of questions.
I'm considering putting the PJ from my 500 on my 490 maico and putting a PWK 38 on the 500.
are all PWK's air strikers? NO
I'm all about low end and mid so I am thinking the 38 or 39 is all I need, no dunes or any wide open stuff here. Is this a correct assumption?
YES 38 AIR STRIKER
my understanding is not to expect any miraculous power increase (which I don't need anyway) but maybe a cleaner throttle response.
CORRECT AND BETTER MILEAGE
damn I sold dredge a 38 airstriker from a KTM 125 I parted out for peanuts a couple of years ago ) BUMMER :
Re: PWK questions
Posted: July 22nd, 2009, 6:42 pm
by honda02
No they are not What I have read Air Strikers are better for topend riding and some of the NON Air Strikers can be made into a Airstriker.
Link:
http://cr500riders.com/cgi/yabb/YaBB.pl?num=1241786356
yota wrote:are all PWK's air strikers?):
Re: PWK questions
Posted: July 22nd, 2009, 10:11 pm
by M.F.D.B.
honda02 wrote:No they are not What I have read Air Strikers are better for topend riding and some of the NON Air Strikers can be made into a Airstriker.
Wrong. Airstrikers are desinged to increase carb signal at low throttle positions. Their very design impedes air flow and therefore would hinder WFO throttle air flow.
Here is a couple pics of both designs:
More than likely not even a Dyno could tell the difference in WFO performance. As you can see in the pics the upper carb is the Airstriker, I find it hard to believe you could "make" a standard carb into and Airstriker. You could however do the oposite pretty easy by removing the vanes.
Re: PWK questions
Posted: July 23rd, 2009, 5:11 am
by yota
Posted: July 23rd, 2009, 6:33 am
by bearorso
Yota, will will get Exactly what you & Lewisclan describe from a PWK.
I fitted PWKs to both my 86 500 & 89 320 Maicos, think 500 was std PWK, 320 AS - it's a long time ago. Both obtained from Sudco, with minimal jetting changes needed. So much better than the Bing, it wasn't funny.
But you won't find any extra top end - the Bings really worked well when opened out to just a big hole.
Posted: July 23rd, 2009, 7:17 am
by honda02
Ok I reread the post on the PWK it the other way around NON Airstriker is better for topend.
I like my PWK works great for me.
Posted: July 23rd, 2009, 8:18 pm
by nmdesertrider
PWK is a great upgrade. I just got the plain old 38 for cost and because it would be easier to get jetting advice.
Posted: July 24th, 2009, 12:00 pm
by yota
thanks for all the input, ordered a 38 airstriker from Pat's.
Posted: July 25th, 2009, 9:12 pm
by AlisoBob
How much?
Posted: July 27th, 2009, 4:57 am
by yota
196.95
http://www.psep.biz/store/keihin_carburetor.htm
parts
http://www.psep.biz/store/keihin_carburetor_part.htm
I've been using Pats for a long time, shipping has never been over 7 or 8 bucks and they don't care if you order 1 item or 20.
Posted: July 31st, 2009, 12:58 pm
by yota
obviously Pat's uses Sudco. Being able to use PayPal with Pats is kinda nice though.
Posted: July 31st, 2009, 4:54 pm
by M.F.D.B.
yota wrote:obviously Pat's uses Sudco.
Sudco is the only importer of Keihin carbs from Japan.