Banshee Wierd Idle Problem

[sfreak25]

My Banshee idles high for about 5 - 10 seconds and then drops down to where it should be but when I go to rev it again it seems to be doggy and then like it clears up and revs great again but still idles high and then it idles back down and repeat. It's firing fine but seems like it is almost loading up and then I have to clear it out . It fires right up 1 kick everytime and I don't need the chocke to start it even cold. It has a 4 mill crank, ported jugs, boysen reeds, timing at 4 degrees, stock carbs with 320 mains, unkown pilots and I am not sure what setting the needle is on. I have checked for air leaks and can't find any, could this be a jetting problem ? List of things I have done over the past week, new gas mixed at 32.1, new plugs, synced carbs, cleaned carbs out and all jets, new choke cross over tube, and I just checked the reeds about 2 months ago and they seems fine too. Any help would be greatly appreciated

[AKheathen]

either you have an airleak, or your idle is set too high. when the airscrews, pilot and needles are set right, you will need to use the choke to start it. i can tell you that you are too rich. screw your airscrews in untill they seat, and back them out 1.5 turns to start with. bring your idle screws down 1/2 turn and try to get it warmmed up to operating temp so you can adjust. make sure there is a little slack in the throttle cables, too. you don't want tension there. once warmmed up, adjust the airscews 1/4 turn @ a time, waiting 20-30 seconds for the idle to change, untill it reaches the highest rpm, and bring your idle down to where you want it and repeat. finally, turn your airscrews in another 1/4 turn and let it idle. next, spray carb cleaner around the intake boots (between the carbs and cylinders) and around the cylinder sealing surfaces. the idle should change if you spray on an airleak. moderately pry the carbs around while you're spraying the rubber, too as it will open any cracks in the intakes. if you don't find any leaks, take it for a spin and see how it runs. don't get tooo exited to rally around and fininsh tuning it later if you notice any hesitations, as that would indicate lean and posibly do damage. read up in the jetting section about plug chops, syncing and knowing when to jet.

[sfreak25]

either you have an airleak, or your idle is set too high. when the airscrews, pilot and needles are set right, you will need to use the choke to start it. i can tell you that you are too rich. screw your airscrews in untill they seat, and back them out 1.5 turns to start with. bring your idle screws down 1/2 turn and try to get it warmmed up to operating temp so you can adjust. make sure there is a little slack in the throttle cables, too. you don't want tension there. once warmmed up, adjust the airscews 1/4 turn @ a time, waiting 20-30 seconds for the idle to change, untill it reaches the highest rpm, and bring your idle down to where you want it and repeat. finally, turn your airscrews in another 1/4 turn and let it idle. next, spray carb cleaner around the intake boots (between the carbs and cylinders) and around the cylinder sealing surfaces. the idle should change if you spray on an airleak. moderately pry the carbs around while you're spraying the rubber, too as it will open any cracks in the intakes. if you don't find any leaks, take it for a spin and see how it runs. don't get tooo exited to rally around and fininsh tuning it later if you notice any hesitations, as that would indicate lean and posibly do damage. read up in the jetting section about plug chops, syncing and knowing when to jet.

 

 

 

Thanks for the help, I have synced the carbs but may need to play with the air screws a bit more so I will do as you said, I was thinking if that doesn't help I will get new pilot jets and go from there. I did check for leaks around all the above mentioned but still came up with no leaks, I was also figuring if I had any leaks I wouldn't have a rich condition but instead I would have a lean condition but I still looked at it and am definatly open to suggestions. I have looked at doing a spark plug chop and actually just read on that earlier today so I will also do that as I want to take my banshee out to the dunes next weekend and I want it right before heading out but if I can't get it perfect I don't mind wrenching at the dunes since it seemes to be normal to do now days

[dunershee]

Thanks for the help, I have synced the carbs but may need to play with the air screws a bit more so I will do as you said, I was thinking if that doesn't help I will get new pilot jets and go from there. I did check for leaks around all the above mentioned but still came up with no leaks, I was also figuring if I had any leaks I wouldn't have a rich condition but instead I would have a lean condition but I still looked at it and am definatly open to suggestions. I have looked at doing a spark plug chop and actually just read on that earlier today so I will also do that as I want to take my banshee out to the dunes next weekend and I want it right before heading out but if I can't get it perfect I don't mind wrenching at the dunes since it seemes to be normal to do now days

Mine use to do that... I had a cloged jet..clean them real good... should fix the problem..

[sfreak25]

I fixed the prob it had 30 pilots, I threw in some 27.5 and now she is much better. Thanks for the help everyone