[zilla rider]

hey guys i have a question about my head gasket. its leaking and it is a new gasket. if my bore is 87mm. what size gasket should i use? my exisisting gasket is leaking right now and it is burning coolant, and yes i did use sealer. it is a k&s gasket. i heard that copper head gaskets are really good for that kind of problem but i dont know much about them, like if i should use sealer on it or not. if you guys could help me out or give me some suggestoins or pointers i would really appreciate it. thanks.