hi guys its my first time on here i own a YAMAHA YBR 125 the exhaust has a large split in it i look at trying to get it welded or getting a new aftermarket exhaust now i have fount one its a leo vince cobra exhaust but on my ybr there is a pipe coming out of my standard exhaust i have heard that this is called a EGR valve does anyone know how to bypass it if this is possible i do a lot of milage will it cause any damage to the engine or the bike by fittng this exhaust