39 vs 41

nmdesertrider · Post by **nmdesertrider** » February 22nd, 2009, 6:35 pm

My old 85 pj is on it's last legs- the slide is worn and I can't get it to do the main jet right without having the 1/4 - 3/4 too rich. My bike seems to use way to much gas and I am sick of the blubbery carburation.

I am going to order a new pwk from sudco- what are the pros and cons of the 41 vs 39? Even though I desert race 99% of the time I am not WOT and I would like to have the bike running fine when it is cracked.
I am thinking just to get a 39 for the following-

easier to tune because people have more experience with them
less expensive
better partial throttle performance

What do you guys think? I am at 5,000 feet-

100hp honda · Post by **100hp honda** » February 22nd, 2009, 6:49 pm

39 is a 41. sudco has local shop bore them out. if 41 is only slightly more money i would get that one, or save the money and get the 39

Post by **AlisoBob** » February 22nd, 2009, 7:45 pm

nmdesertrider wrote:I can't get it to do the main jet right without having the 1/4 - 3/4 too rich.

WFO is the main, 1/4 to 3/4 is the needle.... Two separate circuits.

I can get you the 39mm, for about $165 brand new, I think the 41mm is about $50 more.

I have the 41, and love it. The 39 is a sweet deal, and is about the best bang for the buck you can make.

Your choice, but until you understand the tuning more, both these carbs will behave like your PJ is now.

Post by **AlisoBob** » February 22nd, 2009, 7:45 pm

nmdesertrider wrote:I can't get it to do the main jet right without having the 1/4 - 3/4 too rich.

WFO is the main, 1/4 to 3/4 is the needle.... Two separate circuits.

I can get you the 39mm, for about $165 brand new, I think the 41mm is about $50 more.

I have the 41, and love it. The 39 is a sweet deal, and is about the best bang for the buck you can make.

Your choice, but until you understand the tuning more, both these carbs will behave like your PJ is now.

nmdesertrider · Post by **nmdesertrider** » February 22nd, 2009, 9:12 pm

My PJ is worn out so I don't want to invest any time monkeying with it.

iggys-amsoil · Post by **iggys-amsoil** » February 23rd, 2009, 2:10 am

Desert racing = 41

Bob! John can hook us up for about $220 for the 41? Hmmm.................

ISBB · Post by **ISBB** » February 24th, 2009, 2:26 pm

must be an insider thing.. when i talked to him it was over 300... no worries i picked mine up from sudco thru a diffrent source and am FREAKIN HAPPY with it. Who cares what it costs just get the 41 you will be happy

Post by **AlisoBob** » February 24th, 2009, 4:11 pm

I have posted several time, in different threads, that John from Sudco is partial to our website members, and if you ask for the " Banned Discount", he will deliver some pretty good pricing.....

Post by **AlisoBob** » February 24th, 2009, 4:11 pm

AlisoBob wrote:I have posted several times, in different threads, that John from Sudco is partial to our website members, and if you ask for the " Banned Discount", he will deliver some pretty good pricing.....

ISBB · Post by **ISBB** » February 24th, 2009, 4:34 pm

AlisoBob wrote:I have posted several time, in different threads, that John from Sudco is partial to our website members, and if you ask for the " Banned Discount", he will deliver some pretty good pricing.....

asked for by name and said i was reffered from this website.. even when i went holy shit thats a huge price diffrence he just kinda seemed yup that is what it is.. 39 was like 180 190 bucks 41 was over 300 when i was quoted.

No worries bob.. might have just been a misunderstanding/miscommunication

Post by **AlisoBob** » February 24th, 2009, 4:42 pm

I'll talk to John....

100hp honda · Post by **100hp honda** » February 24th, 2009, 4:42 pm

any machine shop will bore a carb for $50. seems like loomis told me he charges $45. i dont see why sudco would charge $110 more just for a bore job

dannygraves · Post by **dannygraves** » February 25th, 2009, 8:39 am

sudcos new 41.5 isn't bored, but made that way by keihin, so the bore is properly tapered.

100hp honda · Post by **100hp honda** » February 25th, 2009, 3:49 pm

i havent heard anything about a new 41.5pwk but it sounds interesting. do you have a link or more info ?

100hp honda · Post by **100hp honda** » February 27th, 2009, 5:39 pm

i forgot to call sudco today, but is this 41.5 pwk fact or fiction ? lets have details if someone knows

4Z · Post by 4Z » February 27th, 2009, 7:51 pm

Easy enough to bore if you have access to a lathe.

100hp honda · Post by **100hp honda** » February 27th, 2009, 8:00 pm

ya i know its easy enough to bore them. danny was saying theres a new pwk carb thats 41.5 before its bored, after its bored would be around 43.5 and i was wondering if there is in fact a new carb from keihin because ive never heard of it but it could be true. the 41 pro from sudco is a bored 39 pwk, maybe hes thinking of that one

dannygraves · Post by **dannygraves** » February 28th, 2009, 6:33 am

thats what bobber told me that john told him. thats all, I don't have any documentation or anything.

100hp honda · Post by **100hp honda** » February 28th, 2009, 9:58 am

it was all hear say from bob ? ya hes a good reliable source

dannygraves · Post by **dannygraves** » March 1st, 2009, 8:24 am

Post by **AlisoBob** » March 1st, 2009, 9:49 am

100hp honda wrote:it was all hear say from bob ? ya hes a good reliable source

I own one, you dont..... And it seems your too dumb to call Sudco yourself.

I'd say the problem is on your end.

MICK · Post by **MICK** » March 1st, 2009, 10:54 am

AlisoBob wrote:So , I go to Sudco to pick up some goodies.. and a 38mm PWK A/S for Uncle Cracker..... When I get there, John tells me the A/S is out of stock.

While he's gathering up all the goodies, I fumble through the Sudco catalog, and come across the new FACTORY machined 41.5mm PWK. Guys have been having their local machineshops bore 39mm PWK's out from some time, buy only recently has Keihin been offering this service directly.

John gives me a price I cant afford to pass up, badda-boom..badda-bing... its mine.

The machine work is beautiful, I think they hand select the castings to make sure that no "daylighting" occurs during the machine work process.

AlisoBob wrote:I think the price he has for the board is $220. This is about $60 off what most shops charge....

100hp honda · Post by **100hp honda** » March 1st, 2009, 6:42 pm

MICK wrote:
AlisoBob wrote:So , I go to Sudco to pick up some goodies.. and a 38mm PWK A/S for Uncle Cracker..... When I get there, John tells me the A/S is out of stock.

While he's gathering up all the goodies, I fumble through the Sudco catalog, and come across the new FACTORY machined 41.5mm PWK. Guys have been having their local machineshops bore 39mm PWK's out from some time, buy only recently has Keihin been offering this service directly.

John gives me a price I cant afford to pass up, badda-boom..badda-bing... its mine.

The machine work is beautiful, I think they hand select the castings to make sure that no "daylighting" occurs during the machine work process.

AlisoBob wrote:I think the price he has for the board is $220. This is about $60 off what most shops charge....

i missed that post some how, but its irrelevant anyways. bored at the factory, or in a rinky dink shop in southern california, it still starts life as a 39mm. from what danny said, i thought there was a new model that uses a new body at 41.5. its all cool

nmdesertrider · Post by **nmdesertrider** » March 4th, 2009, 8:19 pm

Okay I got the 39 and a DGN needle. Anyone have a starting point for jets at 5000 feet?

dannygraves · Post by **dannygraves** » March 5th, 2009, 8:34 am

for 5000ft... well, start w/ like a 42 pilot and 170 main

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39 vs 41

39 vs 41

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Re: 39 vs 41