air screw and idle screw

[01yamban]

i just put a single pwk keihin carb on my 01 banshee, if the air screew and idle screw are turned all the way in how many turns out should each be for a good start? thanks guys

[ClayAiken]

i just put a single pwk keihin carb on my 01 banshee, if the air screew and idle screw are turned all the way in how many turns out should each be for a good start? thanks guys

1.5 - 2

[Larry's Shee]

1 1/2 on air screw to start. Idle screw is only throttle slide stop. Back it almost out , then turn in to desired rpm

[01yamban]

Thanks guys I don't know what I've done but I can't get it start now with a new carb on it I turned the air screw out 1.5 turns and the idle screw out to turns I tried for turns and just doesn't seem to want fire up?

[01yamban]

I got it running it had nothing to do with the carb a freaking wire came loose under the key it started first kick I started it probably 5 times and starts first kick every time but it smokes like a bastard I don't remember it smoking this much with the stock carbs on it and it won't idle I'm not sure if that's air screw or idle screw what do you suggest?

[01yamban]

Well I got it to idle but in order for me to do it I had to take this spring out that goes over the Idle screw so I can screw the idle screw all the way in ,with it all the way in this it's idles fine ,I'm roughly 2 turns out on the air screw and it's still smoking pretty good I took a video but I don't know how to post it ,am I going to hurt anything with that spring off in the idle screw all the way in? It's starts first kick I could probably start with my hand if I wanted to

[01yamban]

just took it for a ride and it lacked power pretty bad, first and second gear dident feel bad but upwards of that did, i could hear the right side exhaust not always fireing,,,, some backfireing not sure what to do, what should my plug gap be? i put the 165 main and the 50 pilot in like i was told so im stumped?

[01yamban]

Here's a link of the video

[bluebanshee98]

sounds like a jetting issue. does it smoke like that after you rode t?

[ticktock]

Ok, this is what we did for my old 2-1

 

58 pilot/165 main EEK needle

 

Isolate the pilot circuit:

 

Start the bike, let it idle. Adjusting the airscrew(AS), by 1/4 turn increments. When the idle screw is all the way in, start adjusting out. The bike will have a very rough idle all the way in. Adjust out to the point it starts to rev back up, go past this until it revs back down. This will show you where you want the AS set at. Next set it there. Hit the gas and see how it responds. Take it for a spin, not far but 3 gears is fine. If it backfires your pilot is lean, go up to 55 or so and repeat.

 

I am betting the reason it won't idle is you have an air leak at the carb boot where it hooks to the manifold.

 

Back the AS in to about a 1/2 turn out and see how that is.

 

Side note, those silencers sound weird, when was the last repacking?

 

Adam

 

Of note: in the end you want your AS between 1-2 turns out. If its below 1 you need to up the pilot and above 2 you want to drop the pilot.

[01yamban]

Thanks I'll give it a try tomorrow, not sure about the silencers cause I just got the bike a month ago.

[01yamban]

What should my plug gap be?

[ticktock]

Thanks I'll give it a try tomorrow, not sure about the silencers cause I just got the bike a month ago.

 

just an observation about the silencers they dont mean jack as to your problem.

 

To check for an airleak start the bike up, spray carb cleaner around the intake and it will cause the bike to shudder like its starving for fuel and dieing if you have a leak.

 

Adam

[01yamban]

It will shutter because the carb cleaner will bog it out if it gets sucked in threw the leak?

[bluebanshee98]

i would get a leakdown tester

http://bansheehq.com/forums/index.php?showtopic=154986

 

your not gonna be happy when the motor goes due to a air leak. would u rather spend 5x or 6 times the amount for a new top end?