2013 KTM 505 SX

2013 KTM 505 SX closed out its run as the brand's top-displacement sport quad, sitting alongside the 450 SX as one of two serious motocross machines in KTM's ATV lineup. This is a full-on race quad built for riders who want to hit jumps and rail berms on a motocross track, not cruise trails or haul gear. The chassis and power delivery reward an aggressive, committed riding style, and it demands a rider who already knows how to handle a quad at speed rather than someone learning the basics. Ownership means regular maintenance tied to real track use, not casual weekend puttering. The 2013 model carried over without significant mechanical changes from the prior year — buyers comparing it to a 2012 example should focus on mileage, service history, and condition rather than spec differences. As KTM's final year producing the 505 SX, this model has some appeal to collectors and long-time KTM quad racers looking to own the last of the line. Most buyers are experienced motocross quad racers or former KTM dirt bike riders moving into four-wheeled competition, and moderate collector interest keeps well-maintained, low-hour examples worth seeking out over rougher, race-worn units.