If you ride your banshee about 30 minutes or 10 minutes, after warm up, and start to sputtering when you hit wide open throttle
Can be many factors this help me
http://www.bansheehq.com/forums/index.php?/topic/164219-explanation-of-chassis-and-engine-grounding/page-3#entry1819019
http://www.bansheehq.com/forums/index.php?/topic/172766-best-way-to-ground-motor-to-chassis/
Those topics has some pics that can help to chose a way to ground the engine to chassis
This fix the problem of my banshee when sputtering when is warm up
I think the problem is cuz when the stator and screw are hot can lose the contact and don't work well
Note: this is a option that can fix the problem, but remeber all banshees are differents, if this don't fix yours, keep in mind other things like a coil, stator, overheating, compression, air leaks, jetting, spark plugs, plugs, quality of cables