Need help with jetting

[BaNsHeeJuNkEy]

so does anyone know the answer to my question. how do i tell if my idel screws are even on both carbs or does it not matter. my quad only stays running with them all the way in. and my others are 1.5 out. wirh the 48's going to try the 45's wendays when all my mains come in,

[brian]

yeah,

go ahead and drop to the 45 pilots. you should need to use the chokes to

start it cold. i still think you could go down to a 42 but you'll just have to see.

also, what filters are you running again ?

i think that 170 main will be way too fat.

like i said b4, i have ported a 4mil with K&N pods and the same carbs and i

am currently running 152 mains.

try putting in the 165 or smaller main b4 trying to dial in the mid range (needle).

you will probably have to lower the needle one groove (move clip one notch toward

the blunt end). the motor should rap hard off idle when cracking the throttle. if it

is too fat, it will bog and stumble b4 revving up.

 

my idle speed screws are just about all the way in also, so i don't think thats a huge

problem. it is probably still too fat to get it to idle by itself (without opening the

throttle).

[brian]

as far as the slide height at idle........

it is pretty important to get them even. i have heard of guys

using popsicle sticks to do it. they put the tip of the stick under

the edge of the slide with the center resting on the bottom of the inlet.

when the ends of the two sticks look even the slides are pretty even.

this will also need to be done to adjust the throttle cables so the carbs

are syncronized.

 

now, i might get crucified for this because it is important to have the carbs

in sync, but.............

i usually do all of this visually (without the sticks) by fixing on a point in the

throat of the carbs and tuning the slides to look like they are open equally at

idle and they open at the same time and speed when you crack the throttle.

it's just the way i am comfortable doing it. i'm sure that it does take me a bit

longer that way tho.

[BaNsHeeJuNkEy]

i just have uni foams right on the carbs. i am going to put in a 155 main when it comes in from fast should be here wensday or so. and as far as the slides i did the same thing both my adjusters are all the way down and i adjusted the cable at the throtle and they both seem to hit closed at the same time only hear one bank no echo. and they both start to open the same time. got that pertty fast. pilot i know has to go down doesn't rev high almost wants to stall and the plugs are still wet when i pull them out. and the middle ya it stumbles and everything elsa. i got 150-155 coming when i put that in i will post again with news and see what you say.

[BaNsHeeJuNkEy]

Ok brian i or who ever. i was working on it today getting a lot closer i can start it without choke even when cold with is good. but this is were i am at.

 

pilots from 48-42

mains 152

needle still at 3rd clip

1.5 turns out

idel screws almost all the way in.

 

starts first kick sometimes second with no choke idel is pertty good but now when i go to give it gas it doesn't realy bog more so just dies should my main be a 155 still or should i move my needle and if so what way blunt end or point end.

 

also if there is someone that lives close that would want to come by and help would be great.

[BaNsHeeJuNkEy]

ok i put 42's and 150's in. and i seams a lot better. before i put 148 and 40's in. how will i know if i end up going lean. just don't want to pop it tunning rather do it while riden. lol still one and a half out.

[BaNsHeeJuNkEy]

one more thing my timing is still at Zero if i move it to +4 what will change i use 93 all the time. will my pilot get big or my main. just want to know before and will it be safe to do on a pertty much stock motor with just all the bolt on's.

[brian]

sounds like you can go down to 40 on the pilot.

you really should need to use the choke. especially in the

cold. i know it has to be cold there in Mass.

 

if you have 150s in now don't go lower yet. adjust the needle height.

when you give it gas from 1/8 throttle to 3/4 the adjustment will be

mostly in the needle. move the clip one notch toward the blunt end.

after you do that it will feel even better.

then do a plug chop. you need to do the wot test to be sure.

plug chop info

 

now, i don't actually cut my plugs, but knowing what to look for is the important

part. if you look carefully you can see the ring down in there. just follow the rest

of the directions very closely and use new plugs for reading unless they come out

lean. if you are sure of what you are seeing, cut the plugs to read.

 

i always try to keep it a little bit rich on mine just to be safe.

[brian]

one more thing my timing is still at Zero if i move it to +4 what will change i use 93 all the time. will my pilot get big or my main. just want to know before and will it be safe to do on a pertty much stock motor with just all the bolt on's.

 

dont jack with that yet. just work on the jetting.

the effect of the timing on the jetting will be minimal anyway.

change one thing at a time or tuning it will be harder cuz you

wont know what causes the changes.

 

advancing the timing will change the powerband giving it more bottom end, but

it will generally have a negative effect on the top end.

you can advance a stock motor, but i have heard that 4 deg is probably about the max.

Edited January 11, 2008 by brian

[BaNsHeeJuNkEy]

ok i just wasn't sure what it would do as far as gas being lean or rice. so i will wait on that i will try moven the needle to see what happensif i don't notice anything with moven it what should i do go with a smaller main.

 

o ya it has it's cold points here last few days it has only been like 45-55 so not that bad but it is suppose to drop to the teens.

Edited January 11, 2008 by BaNsHeeJuNkEy

[brian]

lemme know what it does after moving the needle.

i would still do a WOT test to verify it is rich even if lowering the needle

does not make a marked difference.

i am sure it is still pretty rich tho.

i think youre gonna end up in the mid-low 140s with that main when you

are finished.

[BaNsHeeJuNkEy]

i will do changed the clip on the needls today but started to poor and thunder and lightning so didn't bother trynt o take it for a fast run up and down the street but if it is nice out tomorrow i will. and will post with tht happen. i know i will have ot do a plug chop or at least pull them out and cheack them. but i realy apreciate all the help.

[BaNsHeeJuNkEy]

ok i started it up today after moven the clips one to the blunt end. keeps back firing and braking up like it is still rich. so i put some 148 in with the clip on 2nd. and my left side keeps mis fireing or something like no smoke will come out then smoke tryed to see if they were in sync and it looks it to the eye. i have no clue what to even do anymore. and it is so nice out to be riden right now too. what should i do. it also seemed to be running a lot better with the needle on the 3rd clip then on the second.

Edited January 12, 2008 by BaNsHeeJuNkEy

[BaNsHeeJuNkEy]

hey i just got back in my dad came out and tryed to help a little and this is what we got.

 

pilots 42's

mains 148's

needle 3rd clip

 

this is were it is ruinning the best so far with out going below that but still not good enough to ride. kind of like it wants to go leaner. from about little over 1/8-1/4 throttle to 1/2 it still brakes up liek kind of rich. also been plain with syncing the carbs because from changing and moven things it kind of changed. before the left was messing up and now it is kind of like the right is messing up with less smoke. what should i do now.

[brian]

run it for a minute or two, then pull the plugs and post what they look

like.

 

you may need to move needles to the 4th clip-one step closer to the pointed end.

(it got better when you richened the mid range so maybe try giving it more)

look to see what markings are stamped in the sides of the needles.

 

 

also, has the float level been set properly ?

do you have new plugs in it ?