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39 vs 41
Posted: February 22nd, 2009, 6:35 pm
by nmdesertrider
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-
Posted: February 22nd, 2009, 6:49 pm
by 100hp honda
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
Re: 39 vs 41
Posted: February 22nd, 2009, 7:45 pm
by AlisoBob
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.
Re: 39 vs 41
Posted: February 22nd, 2009, 7:45 pm
by AlisoBob
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.
Posted: February 22nd, 2009, 9:12 pm
by nmdesertrider
My PJ is worn out so I don't want to invest any time monkeying with it.
Posted: February 23rd, 2009, 2:10 am
by iggys-amsoil
Desert racing = 41
Bob! John can hook us up for about $220 for the 41? Hmmm.................
Posted: February 24th, 2009, 2:26 pm
by ISBB
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
Posted: February 24th, 2009, 4:11 pm
by AlisoBob
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.....
Posted: February 24th, 2009, 4:11 pm
by AlisoBob
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.....
Posted: February 24th, 2009, 4:34 pm
by ISBB
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
Posted: February 24th, 2009, 4:42 pm
by AlisoBob
I'll talk to John....
Posted: February 24th, 2009, 4:42 pm
by 100hp honda
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
Posted: February 25th, 2009, 8:39 am
by dannygraves
sudcos new 41.5 isn't bored, but made that way by keihin, so the bore is properly tapered.
Posted: February 25th, 2009, 3:49 pm
by 100hp honda
i havent heard anything about a new 41.5pwk but it sounds interesting. do you have a link or more info ?
Posted: February 27th, 2009, 5:39 pm
by 100hp honda
i forgot to call sudco today, but is this 41.5 pwk fact or fiction ? lets have details if someone knows
Posted: February 27th, 2009, 7:51 pm
by 4Z
Easy enough to bore if you have access to a lathe.
Posted: February 27th, 2009, 8:00 pm
by 100hp honda
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
Posted: February 28th, 2009, 6:33 am
by dannygraves
thats what bobber told me that john told him. thats all, I don't have any documentation or anything.
Posted: February 28th, 2009, 9:58 am
by 100hp honda
it was all hear say from bob ? ya hes a good reliable source
Posted: March 1st, 2009, 8:24 am
by dannygraves
Posted: March 1st, 2009, 9:49 am
by AlisoBob
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.
Posted: March 1st, 2009, 10:54 am
by MICK
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....
Posted: March 1st, 2009, 6:42 pm
by 100hp honda
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
Posted: March 4th, 2009, 8:19 pm
by nmdesertrider
Okay I got the 39 and a DGN needle. Anyone have a starting point for jets at 5000 feet?
Posted: March 5th, 2009, 8:34 am
by dannygraves
for 5000ft... well, start w/ like a 42 pilot and 170 main