Cometic Top End Gasket Kit 82.5MM Yamaha YXZ 1000R When you're ready to put your machine back together after a top end refresh or complete rebuild, do it with a High Performance Top End Gasket Kit from Cometic. Each one is manufactured from the highest quality gasket materials and they meet or exceed OEM specifications. Features: Raises compression for better low-end power Graphite gaskets feature a steel core, laminated on both sides with flexible graphite Fiber gaskets designed for maximum seal, flexibility and torque retention O-ring gaskets meet or exceed OEM specs