kellyk Posted January 25, 2007 Report Posted January 25, 2007 my brothers banshee has a popping sound or miss when ever it is under a hard pull. jetting seems fine. was wondering if it may be a coil or something. my brother says he cant hardly hear it or feel it when riding it. we just came back from winchester bay this week every time he would climb a hill it would sound as if it were backfiring out of the exhaust. it has toomey pipes, ported cylinders stock carbs, k&n pod filters. he was running 340 mains. thanks Quote
kojack Posted January 25, 2007 Report Posted January 25, 2007 my brothers banshee has a popping sound or miss when ever it is under a hard pull. jetting seems fine. was wondering if it may be a coil or something. my brother says he cant hardly hear it or feel it when riding it. we just came back from winchester bay this week every time he would climb a hill it would sound as if it were backfiring out of the exhaust. it has toomey pipes, ported cylinders stock carbs, k&n pod filters. he was running 340 mains. thanks sounds like its running rich, have you run that setup before with no problems, ie 340 mains same type of gass etc. Quote
kellyk Posted January 25, 2007 Author Report Posted January 25, 2007 sounds like its running rich, have you run that setup before with no problems, ie 340 mains same type of gass etc. yes we have ran that before we even dropped it to a 320 , 330 , still same thing. I ran 340s in mine all week with no problems. Quote
bansheefreak Posted January 25, 2007 Report Posted January 25, 2007 my brothers banshee did this and we found a loose/halfbroken wire going to the coil.. up under the tank.. fixed it and it ran good after words.. does it run like shit sitting still??? if so have it running and grab the wires and move them see if it runs better when they move at certain points... Quote
Crazy05 Posted January 25, 2007 Report Posted January 25, 2007 my brothers banshee did this and we found a loose/halfbroken wire going to the coil.. up under the tank.. fixed it and it ran good after words.. does it run like shit sitting still??? if so have it running and grab the wires and move them see if it runs better when they move at certain points...But dont grab the spark plug wires. You might get the shock of your life. Quote
bansheefreak Posted January 25, 2007 Report Posted January 25, 2007 yeah dont grab the plug wires but just grab the wires going to them and up under thentank.. then go back by the tail light and wiggle them too... Quote
kellyk Posted January 26, 2007 Author Report Posted January 26, 2007 the machine seems to idle fine and run fine just under hard pull or load it has a backfire sound or miss out of the exhaust. Quote
ImTired Posted January 26, 2007 Report Posted January 26, 2007 im gonna go with something from your coil on down to plugs. i had the same thing happening to me before teardown and when i looked up into the cap from the side missing and not running great it was all buggered up in there. also the wires were fucked. get yourself some new caps and wires and i bet you will be fine. you see, under a hard pull your carbs and engine are just packing the ol' go juice into the cylinders and if there is no SPARK to burn that compressed mixture it begins to lugg and pop (which is the equivalent of your exhaust travelling out of the cylinder into the pipe) do you hear a muffled sound leading into this popping sound at all? Quote
g-force Posted January 27, 2007 Report Posted January 27, 2007 same thing was happening to me, changed my plug wire caps and hasn't happened since. Quote
kfngrn Posted January 28, 2007 Report Posted January 28, 2007 When is the last time you changed the spark plugs? Had same problem with mine and I jetted it 2 main jet sizes bigger. this got rid of mine. Only happened 4th gear or higher at high speeds/loads. Quote
kellyk Posted January 31, 2007 Author Report Posted January 31, 2007 we tried new plugs in winchester bay, same thing. we did find one of the plug caps was a little loose got another turn on it , but we havent tried it yet. Quote
Bansheeman1121 Posted February 1, 2007 Report Posted February 1, 2007 I just recently had abput the same problem as you, I replaced my stator and problem solved, check the small stuff 1st becuase a stator can be a little bit of change Quote
hotrodbanshee Posted February 1, 2007 Report Posted February 1, 2007 Mine did the same thing. Thought it was jetting problem, but rejetting never fixed problem. Turned out my plug caps were bad. Get an ohm meter and test your caps, should ohm out at 5000. Mine ohm in the millons. Your plug cap caps have resitors in them and they are a wear item, many people don't know that. Replaced mine with NGK caps from my local dealer for 2.95 each. Took her out and ran perfect. Quote
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