1. Is it ok to take the exhaust off the pred 212 while building it. Mounting/fitting, assembling the bike. Obviously not running it, but is it safe to keep the exhaust off while building ? Or is it a bad idea, encase dust/dirt whatever els falls into the exhaust. Can i just cover the hole with painters tape while working around it? 2.Does anyone know of a flex exhaust for the 212 besides the viper poo poo exhaust below? https://www.ebay.com/p/505874252?ii...QUKYuMTBG6ahrN1CWPAXa1Gf0a6avSB0aAo4KEALw_wcB THanks !