deathmetal5150 Posted July 23, 2005 Report Posted July 23, 2005 Hey guys, just did some mods to my banshee and need a little bit of help. I just put in a 4mm crank, and i put on a keihin 2 into 1 carb. I believe its a 34mm. At any rate. These are going through FMF Fatty Pipes. I let the bike break in and everything, and when im riding on it, the low end and midrange just feels boggy to me, like it takes too long to rev up. When I set it in neutral and give it a rev, you have to go way further on it to get it to rev high than i used to. Im not sure of the size of the jets in the carb, but im thinking maybe the needle clip needs moved up? It just doesnt feel like its running like it should and im thinking its just the carb setup because when i had the stock carbs on it, it ran perfect. Let me know what you think. Quote
Dunsmoor86 Posted July 23, 2005 Report Posted July 23, 2005 Sounds like you are running rich. If the lid is off of the bike put it back on. if it is worse you are rich gets better you are lean. sounds rich. Quote
sredish Posted July 23, 2005 Report Posted July 23, 2005 Your not sure of the size of the jets in the carb? Man, who did your jetting, or did you just throw it in and go? Is it a wet bog, sputtering or just falling flat? What is the throttle position that this is happening at? You need to find out the jets that are in there and get back to us. Also, reat the Troubleshooting your Jetting thread at the very top of this forum. Scott Quote
deathmetal5150 Posted July 24, 2005 Author Report Posted July 24, 2005 (edited) I bought the carb and put it on without changing the jets because the guy said he used the same pipes as i did with it. Anyhow.. I pulled it apart the main jet is 170, the pilot is 48. As far as the needle clip, ive never done a needle clip, but there's no way to get that thing out of there, it has a star on it and says 9. Thats about it, a 6mm will bolt up to the top maybe the needle simply doesnt havea "clip" on it? I took the plugs out, and they're totally black, soaked! They were brand new plugs, took less than 5 minutes to foul them out. I've never fouled a plug before, so its definetely not from luggin it i can tell you that, its just totally rich. What would you suggest? I live outside of pittsburgh in pa, so to give you an idea on elevation. The bike just runs flat, and wont rev high at all unless you hold it totally wide open then you get a hint of high revving (acts as if its fouled so to speak even when a fresh plug is in), but it shouldnt be that way, no sputtering, just acts like its dead. The pipes im running at the fmf fatties, i have the keihin carb, trinity 2 into 1 setup, reed spacers, carbon fiber reeds, 4mm crank, porting, k&n filter. Let me know Edited July 24, 2005 by deathmetal5150 Quote
DBLtapS Posted July 24, 2005 Report Posted July 24, 2005 They guy you got them from at a different elevation? Or maybe jetted for colder weather. Different mods? Read the guide, it took me a couple of tries before I got it right. Any other mods to your bike? Ported? I wouldnt mess with the needle until you get your main jet close. Then fine tune. Go buy a few sizes up down from what you have. Quote
deathmetal5150 Posted July 24, 2005 Author Report Posted July 24, 2005 Trick is though, the 170 seems awfully small to me wouldnt you think? what would you suggest me going down to as far as the main jets and pilots. i dont want to go TOO far with it, maybe a couple steps or so. Quote
Wallynut Posted July 24, 2005 Report Posted July 24, 2005 It wasn't that long ago that someone started a post on what everyong was using for jets/needle settings, do a search, you will find it. Don't mean to be a jerk, but it doesn't seem like you doing much thinking here. Your looking to blow your motor, never trust anyone selling used stuff, reseach next time. You can release the slide from the cable by pulling back on the spring and plastic collar, at the same time grab the cable and work the end out of the keeper (same to put it back on). Once slide is loose, use 6 to take off the cable retainer, needle will come out, write down what you have as a needle. Good starting point 180 main, 45 pilot, DEK needle in 3rd, air screw 1-1/2 Do a plug chop before you drive it too much, otherwise you will be wasting a nice +4 crank Quote
deathmetal5150 Posted July 30, 2005 Author Report Posted July 30, 2005 I been working on this all week after work when i get time and i have to say this is becoming quite frustrating! Since at first it was running super rich, i took the whole carb apart, the needle was a little bent, straightened it out, the needle is on the third position. I took the main down to 148 for starters. I ran it and it ran very well, however, very lean. So i bumped up to 160, ran excellent all the power you'd want, however, still lean. Ok, so went up to 182, started to really burble on the low end, like it was loading up but would clean up a good bit on top. Went down to 175, still would burble on the low end but overall good. The problem im having is the plug color, everytime i go to look at the plugs with that, i'll see a little bit of black dripping on it but when i move my finger over it, its a solid gray color. I mean, if the 175 was loading up a little bit at the bottom end, i would THINK that its a little high, so im saying 170 might be the trick. Problem is, the plug color! I still have the 48 pilot in there, im wondering if maybe i should bump that up? What i did is let the bike sit and idle for 10 minutes, take it for a spin, rev it up real good and kill it, then check the plugs. Please, someone help me! Quote
Dunsmoor86 Posted July 30, 2005 Report Posted July 30, 2005 What were you running for jets when you had the stock carbs? Quote
deathmetal5150 Posted July 30, 2005 Author Report Posted July 30, 2005 When i had the stock carbs on the mains were 280, clip in third position. The thing is though, i just installed a 4mm crank in here, so its going to change a lot, especially with the 2 into 1 carb now. Quote
deathmetal5150 Posted July 30, 2005 Author Report Posted July 30, 2005 maybe im going about this wrong, maybe i should be asking, what color does your plug look when you are running yamalube? I was reading a few articles and some say different oils produce different spark plug colors. Ive actually never had a "brown tan plug" in the banshee, so maybe i need to be looking at this question instead. The plug was wet but no where near fouled, hmm. Quote
Wallynut Posted July 31, 2005 Report Posted July 31, 2005 (edited) You sound like you were close on your main, but you leaned it back out for some reason??? Trust me on this, put in a 180+-main, try a 45 pilot or even a 42(that is what I'm running). If your having "burble on the low end", it's more likely your pilot. Here's a good read on jetting theories which still applies even tho you have a single carb. BenBB put a lot of effort into this. Read and read again, you will learn. Click on the "Here's" Edited July 31, 2005 by Wallynut Quote
deathmetal5150 Posted August 4, 2005 Author Report Posted August 4, 2005 I ended up doin a lot of jetting with the bike. Been switching new plugs in it and going down the strip with it, then goin from there. Basically im getting a dark brown color on the plug now. Im at 165 main, 45 pilot, 3rd clip. Problem is, when i first start it up for the day, it loads up and really needs ran to get it cleaned up then after about 10 minutes, its pretty clear but will load up if you putz around on it. Problem im having now is when i get on it real hard, a couple seconds later it dies out like its not getting gas. If not, it'll all of a sudden rev up to the moon by itself and ill have to kill it. Ive cleaned this carb inside and out, fuel filter is fine, im really getting mad at this whole thing, its like Im thinkin the float is sticking or something. It doesnt bother me to tear off the carb and do whatever, but man, its frustrating with this particular carb right now. Quote
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