apex exhaust

just bought a 2009 apex mountain i am going to turbo it for sure I, was wondering what other upgrades i should do along with it for lightweight, and i also want to get a exhaust. thanks!!!

Hello everyone, I bought an 06 Yamaha Apex a few days ago, initially when I went to go see it he tried to start it for me, took him a few minutes but he eventually got it going once he gave it throttle. (it had been sitting since february) He said the only thing it needed was new exhaust...