keihin pwk 38mm

[BlasterAzores]

1989 KAWASAKI KX250 KX 250 Carburetor Carb Keihin 38 :eBay Motors (item 270475690990 end time Nov-01-09 16:22:57 PST)

So i just bought this 38mm pwk, what main jet you think i should start with?

I was runing an Stock mikuni rejeted to 290 main... no tors... no air lid... B1 pipe.. Vforce3 reeds... reed spacer...
Just need a "close" main jet to start off, the rest should be easy.

I saw that mikuni´s jets go up to numbers like 320, but the keihin just found up to 200.

 

[yb200]

that carb is wayyyyyyyyyy to big

 

[brandoz28]

are you still running stock displacement?

 

[BlasterAzores]

are you still running stock displacement?

yes. stock crank

 

[BlasterAzores]

that carb is wayyyyyyyyyy to big

hoooo shi.... you think so?
Since it came of a 250cc engine i tough it would be apropriated
Even when i get the rest of mods done ?
Still to do... +3crank... 250 LA kit... trail port job !!

 

[xmous3yx]

once u get the upgrades its more suitable but for stock displacement u dont need bigger than a 32mm

 

[BlasterAzores]

once u get the upgrades its more suitable but for stock displacement u dont need bigger than a 32mm

Still you think it can be tuned whitout the mods ?

 

[burnin'_oil_2001]

with the mods that you are planning it will be fine but it will be a little big. if it was an air stryker version of the carb it would be better. a stroker 240 will be able to use it but i would think it would be better with a more aggressive port job like a dune port that is very strong in the mid-range as that big of a carb on a blaster looses some lowend power. if i remember correctly from posts that i have read on here and other forums you will most likely be in the 140-160 main range and you will have to adjust the pilot and needle clip positions. i would ask the engine builder for guidelines as they will better know the needs of your engine than we will. just remeber to be patient when jetting and start from the bottom up! also there is a link in my signature to a good article on jetting.

 

[370]

I saw that mikuni´s jets go up to numbers like 320, but the keihin just found up to 200.

thats because they size there jetting differently.. and the sizes are split differently as well

where mikunis run in multiples of 10 like 200-210-220-230-240 and so on...

kiehns are different.. 150-152-155-158-160

they also base those sizes off of different criteria.. i'll find the article i'm speaking of and copy and paste it here.

 

[ROCKSTAR]

well if you decide you dont want that carb, let me know....i need that carb.....also, i have 2 34mm flat slides..thewy will work better for you..esp with a little modding

 

[nofxfan125]

well if you decide you dont want that carb, let me know....i need that carb.....also, i have 2 34mm flat slides..thewy will work better for you..esp with a little modding

true story. That carb is HUGE!

 

[yes se-r]

bigger is not always better

 

[BlasterAzores]

that carb is wayyyyyyyyyy to big

So thats why i cant find a 38mm Boot..... cause they dont exist

Ill just try to make the best out of it, and if i cant get to work properly... guess Rockstar will have a new 38mm carb

 

[BlasterAzores]

bigger is not always better

B) i could made a joke... but i wont

 

[BlasterAzores]

Found 2 PJ 34mm on auction or $175 Buy now....

Keihin PJ 34mm Carbs,Banshee,RZ350,RD400,,XS650,CR,YZ:eBay Motors (item 130339482564 end time Nov-02-09 18:15:00 PST)

 

[yes se-r]

i would trade with rockstar he said he had 34mm carbs, and could use that 38...why dont you try and set up a trade?

 

[gonzo]

Mikuni does theirs by a flow rated system Keihin does theirs by actual sizes in mm a 150 Keihin is 1.50mm dia. hole

 

[burnin'_oil_2001]

So thats why i cant find a 38mm Boot..... cause they dont exist

Ill just try to make the best out of it, and if i cant get to work properly... guess Rockstar will have a new 38mm carb

yes they are made and i think that sms makes one.

 

[ROCKSTAR]

if you can get your hands on a 34mm pj or any kehin those are really good carbs...but i really want/need that 38 for my LT250r.....its ported and piped, and needs more air..its nasty!!! hahaha hopefully..

 

[LUISFER764]

I have a 39mm in my blaster and it´s so nice, only that mine has a 240 kit and I´m using a 150 main jet. You can put a 130 or 135