Jetting Specs for SJ with pipe

[IceRocket1286]

What size jets should I use for my ski? Single carb, stock 650 carb whatever it is... with a speedwerx pipe. Pipe is the only mod, I will be removing the choke for a primer. I do not know what jets are in it, neither did the previous owner.

 

[Matt_E]

Look up what Factory Pipe recommends for their type 9. Jet up one size for both low and hi, and adjust from there.

 

[romack991]

ur carb is a 44 btw

 

[Big Kahuna]

Look up what Factory Pipe recommends for their type 9. Jet up one size for both low and hi, and adjust from there.

These specs would be assuming he is running duals............ not sure, but I dont think there are any specs for Jetting with a type 9, just like the B Pipe Mod Chamber, they do not provide specs for that setup.


There is no jetting specs for his set up................. look up FPP for a 95 SJ with the limited pipe (Wet - B Pipe) if the jetting specs say 140 low then put a 155 high (Just an example), figure on 15 points about high and low then go from there.

 

[romack991]

These specs would be assuming he is running duals............ not sure, but I dont think there are any specs for Jetting with a type 9, just like the B Pipe Mod Chamber, they do not provide specs for that setup.


There is no jetting specs for his set up................. look up FPP for a 95 SJ with the limited pipe (Wet - B Pipe) if the jetting specs say 140 low then put a 155 high (Just an example), figure on 15 points about high and low then go from there.

another factor is that its not a true 701, you've still got the 650 transfers, cases, and intake.

didnt you buy the engine and pipe together, so shouldnt this already be atleast close to the right jetting?

 

[waxhead]

pull the carb apart and tell us what the jets in it now are

 

[IceRocket1286]

its a 650 with 701 cylinders and pistons etc. I dont know what the jetting is, and I couldnt even tell ya how to find out, never done it before.

EDIT: I pulled it off just now and took the cover plate off. This is were I become CLUELESS! now someone help me

 

[IceRocket1286]

165 high and 35 low. The low has the number engraved on the side, i could BARELY read that dang thing.

now, is this good or no?

 

[waxhead]

no
i would think you would be wanting about a 120-130 low and a 100-120 high
with about 20-30 psi popoff
i know there is a huge variation in my jets i am telling you but this is how i would start out and work from there

 

[jetskiking]

This is what protec recommended for my motor thats a 6m6 bored to a 701 and ported 135 main ,120 pilot ,2.0 needle and seat, 65g spring.This is with coffmans pipe. They are all different so something tells me that you are going to learn about carbs real quick.

 

[IceRocket1286]

yeah, real quick. Its hard to read the smaller jet, i believe its 135 not 35, typo. How do I determine the needle and seat and spring etc...?

 

[orange flattop freestyler]

the seat will have the size engraved on the end

 

[jetskiking]

You have to pull the little cover beside the jets and its written on the side. Its a little eisier to see than the one on the jet. The spring is determined by color. I think the 65g is silver

 

[orange flattop freestyler]

tell us what colour the spring is and wether its been wound clockwise or anti clockwise

 

[waxhead]

This is what protec recommended for my motor thats a 6m6 bored to a 701 and ported 135 main ,120 pilot ,2.0 needle and seat, 65g spring.This is with coffmans pipe. They are all different so something tells me that you are going to learn about carbs real quick.

wow thats close
it was just where i would start off
to check what your n/s seat are then you have to pull the seat out and have a look
it will be written on it

 

[h2odesperado]

anticlockwise... hehe















I KID!

 

[IceRocket1286]

the spring is silver, wound clockwise. the seat is the big jet on the left, correct? and the needle "hangs" off of the little mechanism which the spring pushes against, correct?

I pulled them out, cant find any engravings.

 

[jetskiking]

yep. The needle and seat are the assembly on the other side of the little actuater from the spring.

 

[orange flattop freestyler]

look on the end of the seat the goes into the carb, ie not the end that you see when its installed

 

[IceRocket1286]

alright, ill look tomorrow. Ive got to go to hockey and beat up some old guys. So, I should look on the needle, right above the black point on it, that i do not see when installed?