Need Some More Jetting Help

[bansheeman_05]

I have a few other threads on here about jetting, but I figured I would start again. I just put on my new pair of Keihin 28mm PWK's. I live in Central PA about 1600 ft above sea level. My Banshee is stock other than Bills Pipes and Silencers, and I am running Yamalube 24:1. (May lean it up a bit though). I started with 155 mains and 52 pilots. I pissed with it awhile and it seems to be running very lean. (Pipes get hot very fast, the plugs are staying white, and it just will not take off at all). The air screws are in the back of the carbs so I figured that screwing them in will make it richer. I have had them at 1/2 turn out with no success. I have also dropped the needles to the lowest notch, but still lean. I am just wondering if I am doing anything else wrong to make it run lean. The input that I received on here said that this pilot and main setup would be safely rich, but it doesn't seem to be the case. Where should I go from here. I was also wondering if anything could be done with the idle screws (black plastic spring loaded screws) to make it run more rich. It idles fine, so I figured it wasn't that. I do not think there are any leaks or anything. Does anyone have any idea??

[slowblueshee2]

What does it do on a dry rev if you hold the throttle open for a few seconds? Does it rev crisp or bog out? I know I had some weird plug readings when I first messed with the 28's.

[bansheeman_05]

What does it do on a dry rev if you hold the throttle open for a few seconds? Does it rev crisp or bog out? I know I had some weird plug readings when I first messed with the 28's.

 

It is def. not bogging. At first I thought it may be, but it seems to be way lean. It heats up really fast which scares me. do you think I should just go up a size or two on both jets??

[slowblueshee2]

Your pilots should be close where your at. If you get too much pilot you will make it real lazy off the bottom. Just go up in the main and see what kind of results you get.

[slowblueshee2]

Just remember a real rich condition can create alot of heat also. That is why I asked if she would rev crisp. I ran stock carbs on my ported 350 and she asked for a 410 main believe it or not. When I switched to the 28mm pwk's I was running a 150 main and 50 pilot. Thought you might be fat but from the sounds of it your lean. I had bigger jets at first than 150's and it would flubber on the top. Hope that helps some.

[bansheeman_05]

Just remember a real rich condition can create alot of heat also. That is why I asked if she would rev crisp. I ran stock carbs on my ported 350 and she asked for a 410 main believe it or not. When I switched to the 28mm pwk's I was running a 150 main and 50 pilot. Thought you might be fat but from the sounds of it your lean. I had bigger jets at first than 150's and it would flubber on the top. Hope that helps some.

 

Hey man,

 

Thanks for the help. I will try it out. Like I said I think that I am very lean, and just the way it feels it feels like it is starving for gas. I am going to triple check for leaks, and if that doesn't work go up on the main. I will keep you updated. Thanks again.

[slowblueshee2]

It is kinda hard to believe that thing is asking for more jet, but I guess it is possible. I sold my 28's to a buddy that is running t6's, v-force 2's. Gonna dial him in this weekend. I let you know what we end with on the back. It is a similar setup to what you have. It is real cold where you are at right now? That can play a big role too.

[bansheeman_05]

It is kinda hard to believe that thing is asking for more jet, but I guess it is possible. I sold my 28's to a buddy that is running t6's, v-force 2's. Gonna dial him in this weekend. I let you know what we end with on the back. It is a similar setup to what you have. It is real cold where you are at right now? That can play a big role too.

 

Sounds good. Let me know how you make out. It is prolly gonna be about a week til I get to mess with mine some more, but I will let you know how I make out. I just ordered the bigger jets so its a waiting game now. I thought that I would be safely rich too, but who knows. I am going to pull them off and clean them again and just see if it is something dumb.

 

It is not cold here. It has been about 65 to 75 on the days I have been messing with it. Its hard to tell, nothing is easy. haha

[dragbanshee]

Sounds good. Let me know how you make out. It is prolly gonna be about a week til I get to mess with mine some more, but I will let you know how I make out. I just ordered the bigger jets so its a waiting game now. I thought that I would be safely rich too, but who knows. I am going to pull them off and clean them again and just see if it is something dumb.

 

It is not cold here. It has been about 65 to 75 on the days I have been messing with it. Its hard to tell, nothing is easy. haha

 

lowest notch closest to the point of the needle? check your pilots really good those things clog very easily.

[slowblueshee2]

Well we ran my buddies bike with the t6's. His bike seemed pretty happy with 140 mains and 50 pilots. We are about 500' in elevation and do all of our riding at sea level. Still surprised that thing could ask for that much jet. Good luck.

[bansheeman_05]

lowest notch closest to the point of the needle? check your pilots really good those things clog very easily.

 

No I have it on the highest notch if you look at it that way. The notch would place the needle the lowest into the carb? Do I have it backwards here??

[bansheeman_05]

Well we ran my buddies bike with the t6's. His bike seemed pretty happy with 140 mains and 50 pilots. We are about 500' in elevation and do all of our riding at sea level. Still surprised that thing could ask for that much jet. Good luck.

 

That is what I am thinking too. I haven't had a chance to mess with it, but I will def. check the pilots and make sure they are not plugged and go from there. I will keep younz posted. Thanks for the help again fellas.

[mopar1rules]

yes, you went the wrong way with the needles. put the clip in the closest groove towards the pointy end of needle. that will raise the needle in the needle jet and richen things up a bit. try it at this position and report back.

[bansheeman_05]

OK here is an update on my jetting situation. I have seriously messed with this thing from 8AM to about 9PM and I still don't have it dialed in. I have it running good though. It still seems to be getting hot rather quickly though and again that scares the shit outta me. Just so you don't have to search for the specs again, I am running a 2005, with Bill's Pipes, stock reeds, stock airbox with stock filter, but I have just today REMOVED the snorkle, and I am at about 1600 ft above the big pond. I got it running (not just spuddering like before) with 40 pilots and 148 mains, with the needle in the second notch from the top. It ran fast, but got hot quick. I checked the plugs and they looked a bit burnt. I went up to the 150 mains and 45 pilots and moved the needle to the middle clip. I ran it for a little while, and it runs like a beast, but again it is getting hot and the plugs were decent, but still a little bit burnt. What do you guys think I should do from here? It seems to idle and take off pretty well, and has good power all the way up through the gears. The heat issue and plug checks are the only thing that concerns me. How hot do younzes pipes get after a short run?? Please let me know what you think. Thanks again to all for the help.

 

Tyler

[bansheeman_05]

I just wanted to add that they are 28MM Kiehin PWK's with the stock needle and I run in about 50-80 degree weather. Like I said it seems to be running good, but there is minimal smoke coming outta the pipes and its hot. Should I move up on the jets or just bump the needle up or just one jet?? Thanks guys.