OK, so i have had my banshee for about 8 months now and i keep breaking pistons skirts, for about the first 2 1/2 months it was fine, and then my top end went on the left cylinder but it didn't break the skirt and it was just one cylinder so i still had one fine piston. I then got a set of pistons off a buddy that were in perfect condition, and then my bottom end went one the left side. so then i bought a motor off ebay, it was almost complete but it was missing the trans gears and some bolts and shit but i had all that from my old motor, so i put the new cylinders, crank and pistons that were bored .040 in and it broke the skirt on the left cylinder, so i put my old cylinders on with the old pistons and it broke one skirt in the right cylinder, then it broke the skirt on the left cylinder. for the winter i decided to take it apart and paint some stuff so i did and then bought some pistons for the bored cylinders, and i also bought a 2 into 1 intake trying to elaminate leaning of one cylinder, so everything was fine for about a month and then the left skirt broke agin, over all i have 5 or 6 broken pistons so i am fed up with it and i am not going to try fixing it untill i find out the problem,
sorry for the long post and thank you for your help