whats the best way to modify the motor on my 02 cr125? i talked to a local tuner and he said the ports were too big. he did say using epoxy to make them smaller would work though he doesnt have a lot of experience working them. what about different heads like phathead or VHM? also i remember seeing in a magazine that team geico(previously amsoil) had turned it into a long rod motor and also what of strapping on a 97 cylinder?