I have a 2004 banshee.........
I kept the stock basket (Yamaha has proved good tech on it and it works awesome!!!!)
Try some clutches out of a YZ490 instead of replacing them with mods or stock.......and also go with 3 stock springs ...and 3 barnett springs
I recently put a stroker motor in my shee .....so I was forced to go to 6 barnet springs.......
What a difference with YZ 490 clutches there thicker and stronger!!!