I have a 1998 Tigershark TS1000L. I was ridding just fine. After 20 minutos I started lossing power I dicede to go back to shore and check the sparkplugs with a big soprise. I found the cylinder # 2 and #3 has a big hole on the center of the piston. What could went wrong?????
I like to repair this problem. I order a top end kit, but i like to know what went wrong before I install a new top end and prevent to this do not happen again.

Thanks in advange