So I blew third gear in my yamaha raider, making it worthless. Anyway now i’m looking into a warrior. So I found one and have a few questions. There’s a midnight 2006 warrior for sale near me with a stage IV kit. It says the stage IV kit was installed at the dealer. First of all it has a stock pipe on it, why in the world would they do all these upgrades and keep the stock exhaust? Anyway how do I get the ecu retuned after I put aftermarket pipes on it? Also is the stage IV warriors reliable? Anything I should look out for on the bike? Is the tranny gonna be able to take all the extra power? Here’s a few pics.