scottt07 Posted October 8, 2015 Report Share Posted October 8, 2015 I have 2 1998 Yamaha banshees both are completely stock I've been having problems with one of them. They've both been sitting since last season I pulled both out and cleaned the carbs on both bikes.. the one runs great.. the other one will start right up idle nice.. after 20-30 seconds the left side cylinder cuts out and the exhaust stops smoking on that side.. if I turn the killswitch off the back on before it dies the left side starts firing again.. I tried cleaning the carbs once again and soaking them in carb solution for 2-3 hoursnI tried the cdi and coil from my other bike as well as new spark plugs.. I also went ahead and installed fresh reeds. None of this helped.. i checked for any loose connections or splits in the wires and found nothing.. I sprayed all my electrical connectors with electrical cleaner.. Ive tried all that I can think of.. any suggestions?? TORS system is removed from the bike.. bike has 125 psi on both cylinders... Quote Link to comment Share on other sites More sharing options...
trickedcarbine Posted October 8, 2015 Report Share Posted October 8, 2015 Spark plug boots, pick up coil adjustment .018, slides are correct? 1 Quote Link to comment Share on other sites More sharing options...
scottt07 Posted October 8, 2015 Author Report Share Posted October 8, 2015 I installed new spark plug boots as well as tried the coil & cdi from my other running banshee.. also tried swapping the slides. didnt make much difference.Is there a way to tell which slide belongs in which carb? Ill check the pickup coil gap tommarro. Quote Link to comment Share on other sites More sharing options...
scottt07 Posted October 8, 2015 Author Report Share Posted October 8, 2015 I also removed the flywheel to see if there was any rust or debree on the stator or flywheel and both looked like brand new still.. I didn't think of checking the gap on the pickup coil at the time.. At one point when messing with it. the opposite cylinder cut out and the left side was firing.. almost seems like its coil going out but I tried the coil from my other shee that runs great so I figure that couldnt be it.. its got a brand new petcock on it.. I flushed the tank as well.. im gonna check the hose and T that distribute the gas to the carbs. possibly the one sides restricted? Quote Link to comment Share on other sites More sharing options...
hoppedupandcutdown Posted October 8, 2015 Report Share Posted October 8, 2015 Quote Link to comment Share on other sites More sharing options...
scottt07 Posted October 8, 2015 Author Report Share Posted October 8, 2015 Ok i checked the slides they were in correct.. checked the pickup coil gap. It was off by a bit so I set it to .018. Still no luck.. After that I removed the stator from my other shee and tried that.. still misfiring.. Quote Link to comment Share on other sites More sharing options...
blowit Posted October 15, 2015 Report Share Posted October 15, 2015 Swap the plug wires side to side to determine if this is electrical or fuel related. Electrical will mean the problem moves to the right side but my gut says this is fuel related. When you hit the kill switch you are allowing it to load up a bit. Try turning in the air screw on that side to .25 turns out but note where it was. You also need to make sure slides are sync'd correctly. This sounds more like a sync or idle setting issue but may be a partially blocked pilot jet on that side. Just because you did a carb clean does not mean they did not clog again. The in tank filter sucks monkey balls. Use an inline high flow. Brandon Mull Engineering Quote Link to comment Share on other sites More sharing options...
2smokesJg Posted October 16, 2015 Report Share Posted October 16, 2015 Bump Sent from my iPhone using Tapatalk Quote Link to comment Share on other sites More sharing options...
n2otoofast4u Posted October 16, 2015 Report Share Posted October 16, 2015 Do this. Hook clear fuel hose up to the drain on the stock bowl, route it upwards and open the drain while the bike is not running. Now watch that clear hose. Does the fuel level drop during the 30 seconds while it's idling? Quote Link to comment Share on other sites More sharing options...
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