Banshee Dosen't Run Right

[swhitey917]

Sorry if this sounds stupid guys but i am trying to figure this whole jetting thing out. So if my banshee is smoking pretty good, feels real doggy, and will sometimes backfire, does that mean i am running lean or rich, and if you are lean (or rich) do you go up or down in jet size. Thanks for the help in advance.

 

I ordered a bunch of pilot and main sizes so they should be in next week sometime. Last time i rode the shee was really doggy, i tried starting it today and if backfired twice so i just pushed it back into the shed and said fuck it. (it was a little colder out today)

[donkeypuncher]

Sorry if this sounds stupid guys but i am trying to figure this whole jetting thing out. So if my banshee is smoking pretty good, feels real doggy, and will sometimes backfire, does that mean i am running lean or rich, and if you are lean (or rich) do you go up or down in jet size. Thanks for the help in advance.

 

I ordered a bunch of pilot and main sizes so they should be in next week sometime. Last time i rode the shee was really doggy, i tried starting it today and if backfired twice so i just pushed it back into the shed and said fuck it. (it was a little colder out today)

 

 

sounds like you're running rich. when its running rich you need to put smaller jets in to lean it out. as to wich jets you need to change depends on where in the throttle it's boggy.

[swhitey917]

sounds like you're running rich. when its running rich you need to put smaller jets in to lean it out. as to wich jets you need to change depends on where in the throttle it's boggy.

 

It is boggy in the low rmp range in 1-3 gear the most.

[AKheathen]

also, if your oil does not support freezing temps, it will separate to the bottom of the tank. this means that you will start out running alot more oil and less fuel. the plugs will oil foul and your fuel will be leaner. jetting is mostly therottle related, rather than rpm

[R. Rollins]

Dont give up :

Real soon after you get in all those parts you will have her up again.

 

 

:cool:

[swhitey917]

also, if your oil does not support freezing temps, it will separate to the bottom of the tank. this means that you will start out running alot more oil and less fuel. the plugs will oil foul and your fuel will be leaner. jetting is mostly therottle related, rather than rpm

 

It hasn't gotten below freezing so i don't think that is my problem and i shake my tank before i ride anyway. I would say my problem is in the first 1/4 throttle.

[swhitey917]

Dont give up :

Real soon after you get in all those parts you will have her up again.

 

 

:cool:

 

I was pretty close to giving up the other day. Its just very frustrating when something is wrong and you can't ride and you have no clueon how to fix it.

[AKheathen]

that bogging at the bottom can be fixed by playing with the airscrews and/or dropping the needles, but the backfire is likely coming from lean mains. normally you start by getting the mains right, then setting the needle to run right between 1/8-3/4 throttle, and then the pilot.

[swhitey917]

that bogging at the bottom can be fixed by playing with the airscrews and/or dropping the needles, but the backfire is likely coming from lean mains. normally you start by getting the mains right, then setting the needle to run right between 1/8-3/4 throttle, and then the pilot.

 

So going with a bigger main should help me out. But why am i backfiring like i am lean but smoking like i am rich?

[AKheathen]

So going with a bigger main should help me out. But why am i backfiring like i am lean but smoking like i am rich?

did you put the new jets in yet? what are you mixing @?

[swhitey917]

did you put the new jets in yet? what are you mixing @?

 

I have not put in any different mains in yet. I am mixing yamalube @ 3 oz to 1 gallon.

[swhitey917]

Ok i just added Paul Turner Mids to my list. So i have:

Paul Turner Mids

Uni air filter with air box lid removed

.020 bore

Yamalube 3oz / 1 gallon of Premium (93 octane)

Elevation= 540 ft

 

Does this change any jetting that we have previously disgused.

 

Smokes really bad, plugs are black, so i am running pretty rich i believe. Seems like shee is getting to much fuel. Do i go down or up in main jet? What about pilot? sorry if these are stupid ?'s, i am new to jetting.

Edited April 7, 2009 by swhitey917

[AKheathen]

you go down in size to lean out. what's in there now?

[Darthwall]

I run 50to1 motul synthetic do you use a ratio rite cup or just go off the bottle and a measuring cup either way it sounds like you need to go down a couple mains and pilots what put in a new set of plugs and tune it down a couple mains if it is a stock motor I would run it at a 50 to 1 ratio just go to the local auto parts/powersports store get a cup and use the recomended ratio amount per gallon if the motor is a lil more compresion pour some octain booster in. start 2 main jet sizes lower than is in there and go from there use the pilots as a fine tuning sort of speak every 2-3 mains drop or raise a pilot depending the way the plugs look if you foul out a set either clean them with a wire brush or use a new set. jetting can be a bitch just learn to read the plugs it will work out

[AKheathen]

what?

you only change the pilot to correct low throttle mixture, and you tell by the airscrews. if you inverted the pilot size to the main jetting change, it either wouldn't run in the winter, or summer.

using a wire brush can leave deposits that will track the spark down the insulator. use a torch to clean plugs; that's how they naturally clean themself.

octane booster doesn't do shit for octane. +0.2, at best