chrisdoc0608
insulting
- Location
- rocky mount, nc
i know that putting a jet in the return line restricts the flow, but what is the purpose of this and when would it be necessary to do?
purpose of jet in return line
- Thread starter chrisdoc0608
- Start date
crammit442
makin' legs
- Location
- here
Mikuni SBN's have a built in return restriction. On some aftermarket carbs the internal return is drilled. This allows the use of variable return restrictors in order to achieve desired fuel pressure. It's just one more tuneable circuit.
chrisdoc0608
insulting
- Location
- rocky mount, nc
cool, thanks guys
DAG
Yes, my balls tickled from that landing
- Location
- Charlotte, NC
are these drilled out from factory on AM SBN's mikunies?
or how do you know if its drilled or not?
or how do you know if its drilled or not?
ski_crazy
ISJWTA member #5
- Location
- Holts Summit, MO
How do you know what size jet to run to restrict flow? Where is a good place to start? I think thats what my Sxi needs.
Kaveman
Born in USA(not Kenya)
- Location
- texas but soon tejas
If you need them, as I do with my Full Specs, the builder (Ed Brezina) will know what you need. If you have these call him, if you have others get in touch with the manufacturer. You should only need them in modified carbs.
I think my restrictor is a 60 Mikuni main jet screwed into a tapped brass hose union.
I think my restrictor is a 60 Mikuni main jet screwed into a tapped brass hose union.
Last edited:
- Location
- central florida
You also need this restrictor in the return line if you are using the old round bodied (diaphragm area) Mikuni carbs. About 1/2 mm or smaller works fine
kawyjunki
NODNARB
- Location
- Springfield,Branson,Mo
What is the best way, and where in the carb body do you check to see if your carbs have the restricters drilled out?
accbr
addicted
- Location
- Lexington, KY
That's what Ed told me to use for mine as well. You can screw a main jet right into the plastic fitting where the return line connects on a stock SJ fuel tank.