maby it's the rider...just sayin .........................maby lay off the doughnuts there big fella.............................wht size track you run.
My Mom rides an 08 Phaser MTX and she was having a similar issue. She got some kind of kit installed.....I "think" it was called an anti-bottoming kit. I will check with her and get her to respond to this thread.
I ride the 08 Phazer MTX. I took my Yamaha to an Arctic Cat dealer who had a technician who use to work for Yamaha. He did a terrific job of tuning my machine. Bottoming out was one of the problems with the machine, so the technician put a bottoming out kit from Yamaha on it and set the tension. It seems to have fixed the problem. However, if it hadn`t fixed the problem, the next step would have been to put heavier springs on. The name of the technician is Will. He no longer works for the Arctic Cat dealer. I`m not sure where he works, but if you wanted to try to find him, you could phone 1-403-380-3376 or fax 1-403-394-9911. (which is a ski-do dealership).