Spitfire Posted January 11, 2006 Report Posted January 11, 2006 (edited) Hey guys, I'm working on friends '02 Banshee. It's been running like crap so we're trying to narrow things down. While doing this, I noticed that the carb's are missing the idle screw (or idle speed control, whatever you want to call it). I'm not familiar with Banshee carb's at all, so I snapped a pic of it (excuse the filth, we were riding around in my muddy yard before I took the pic). The red circle is where I think the idle screw is SUPPOSED to go (when he bought the bike, there was actually a vent hose there). The yellow circle is the air/fuel mixture screw. Now, is there anybody who can confirm that the screw is missing? Also, when the bike is idling, it doesn't want to rev out all the way, it loads up in the upper RPM's, but when you're riding it, once you get it into 2nd gear and above, it revs out fine. I know this is a minor jetting issue, so what would you suggest doing, would the air/fuel mixture screw be able to solve that, or would I need to change jets? Thanks in advance!! Edited January 11, 2006 by Spitfire Quote
2003LimitedBanshee Posted January 12, 2006 Report Posted January 12, 2006 You don't want to compensate for the missing idle speed screw, by making jetting changes. You want to replace the idle screw. I believe Toomey sells just the screws (about $23), and I'm sure others do as well. Otherwise you have an air leak, and worse you have a direct line for dirt, dust and moisture to get into the carbs --> cylinders. Quote
Spitfire Posted January 12, 2006 Author Report Posted January 12, 2006 So it's definately missing that screw, which equals into an air leak? I guess that's one more thing we can check off of "hunt for problems". Thanks Quote
Spitfire Posted January 12, 2006 Author Report Posted January 12, 2006 How come when I look into the hole where the screw is supposed to go, I can't see threads? I tried spraying some carb cleaner in there while it was running, and it didn't affect it at all. Should it? Toomey sells a kit, that includes the idle screw, nuts, and a drill bit and a tap. Why would I need the tap, because it's not a stock part? Quote
2003LimitedBanshee Posted January 12, 2006 Report Posted January 12, 2006 Maybe I am looking at the picture wrong, maybe not?? It does appear that the boss is drilled through, but maybe it is just dark in the back, and mud sitting in the bottom of the boss. Now, the other carb does have a screw in this location, correct? Without the idle screw installed, I believe the slide should be able to go past the hole (no idle screw to stop it), thus at idle the hole would be almost or entirely sealed, thus no affect (or minimal on idle speed), however at higher rpm, the slide should expose the hole, creating the air leak. Making a few fairly educated guesses here, but could be wrong... Quote
Spitfire Posted January 12, 2006 Author Report Posted January 12, 2006 (edited) Well, the hole is definatley not drilled, considering it can hold a liquid. This goes for both carbs, no idle screw on either carb, no hole on either carb. I have another question, at an idle, this thing actually smokes quite a bit, and likes to run rich, but I just did a WOT (5th gear chop) plug chop and the plugs actually look LEAN. I know nothing about what jets should be in it, so maybe you can help us. The bike's got Pro Circuit pipes, and open K&N filters. We're at around 500 feet for elevation, the temperatures between 40-50 degrees lately. It has 230 mains, and 25 pilots, does this sound right? Thanks! Here's a picture of the plugs, one of them almost looks like it overheated. Edited January 12, 2006 by Spitfire Quote
2003LimitedBanshee Posted January 13, 2006 Report Posted January 13, 2006 Yeah, from the pictures I would suspect that it is lean, plus I would anticipate much richer jetting with the Pro Circuits and K&N's (clamp on's right?). I haven't jetted a PC piped bike, but I would guess that you should be in the low to mid 300's with most pipes and clamp ons. Probably around 340 or so at those temps. At an idle it is not at all uncommon for the bike to smoke some (hard to say because ALOT is different for every person, are we talking fumagating for mosquitos?). Is it the smoke or something else that makes you think that it is rich at low RPM? Quote
BansheeCJ3 Posted January 13, 2006 Report Posted January 13, 2006 it also spits out oil out of my silencers. Does this tell you anything??? I always thought it was running too rich. IDK...this Banshee is confusing thanks for the quick reply though Quote
Banchetta Posted January 15, 2006 Report Posted January 15, 2006 Its a good think you didn't run that very long....Start off w/ 300's and go from there..this is for 60 degree temps. If your colder than that, then go to 320's to start...Run it in 6th gear for 5-10 seconds, kill it, coast to a stop and take another pic of those plugs....looking at them you did a wot run and rode back home...make sure you check the plugs after the wot run, cruising after will alter what they look like....I would also order some 30 pilots..Pc pipes like a rich pilot, you must have a hard time starting it??? Quote
NEVER SATISFIED Posted January 16, 2006 Report Posted January 16, 2006 does it still have the TORS on top of the carb.... Quote
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