38 SBN's....Are they all the same ??

[Maico]

Is there any difference amongst the various 38 SBN carbs out there?? Castings...internal passages...etc,etc. If so...what are they?? I'm looking to set up an old skool Kaw 550 motor using an Ocean Pro aluminum race cylinder/head and twin 38 side draft intake. Is there any company out there that mods 38 SBN's?? I talked to Ed at Full Spectrum about it and he said they haven't ever done anything w/the 38's but it's not out of the question. Any info is greatly appreciated.:hail:

 

[waxhead]

yes there ar ea lot of differences between them
i think the best ones to get are the atermarket ones

 

[Maico]

Thanx Wax. How are the aftermarkets diff from the original equip carbs?? Knowing what I'm looking for in a set up...am I better off trying to find a set of Sea-Doo or Yamaha or Polaris carbs ??

 

[waxhead]

i think the polaris and seadoo are the better choice

 

[Maico]

i think the polaris and seadoo are the better choice

Kudos again,Wax. Any forseen reason I couldn't use a set of carbs from a triple rack set-up (Polaris) other than coupler and throttle drum issues?? Any reason for the shy away on the Yamaha carbs?? Opinions and past experiance welcomed.

 

[michael950]

Does that go for others as well, not just Mikuni?

Novi, etc.

 

[Maico]

Does that go for others as well, not just Mikuni?

Novi, etc.

By that,what do you mean?? Other hot rod shops that deal w/38's??

 

[waxhead]

the yammie one have a boss in the carby
if you machine that out then they become hard to tune

 

[SUPERTUNE]

Use aftermarket mikuni's right out of the box! Most application OEM carbs have jetting formats that can and will be hard to tune on other motor set-ups! (I.E. throttle valve #, internal drilled circuits are set-up for fuel economy and can make jetting very hard especially without very restrictive air cleaners)

 

[john zigler]

maico, i have some good polaris 38's here if you want to try them. i too have wondered how they'd work.

100.00 + s&h for a pair. you will need an external fuel pump though.

zig

 

[michaelart]

ok......I have a similar carb question....not to hijack, but contribute. I bought a set of mikuni 44sbns that came off of a kawi 750. What would it take to run these on my 62t motor? Are there differences? I would imagine main, pilot, and popoff would be different...anything else...?
thanks

 

[john zigler]

ok......I have a similar carb question....not to hijack, but contribute. I bought a set of mikuni 44sbns that came off of a kawi 750. What would it take to run these on my 62t motor? Are there differences? I would imagine main, pilot, and popoff would be different...anything else...?
thanks

kawi never had a SBN 44 stock on a 750, so those are probably an aftermarket carb. you would just need to rejet for your application.

zig

 

[surfjetlouie]

The carb I offer to you in the other tread you had is what you are looking for
set for primer new in the box $85 each and both have the fuel pump so you will need to run one fuel line for each no restritor needed, in the return line.
many have used my carb and they are realy good.

 

[michaelart]

carbs.....

cool......so for $165.50 shipped, I got a good deal....eh......what are these......

 

[michaelart]

BTW.....thx john

 

[michael950]

What I was asking if Novi's internals (or buckshot or Red Tops) for a Yamaha are the same as Kawasaki or sea doo... the only difference between a 44mm sea doo and 44mm Kawi is the orientation. (Inline vs side by side like).