It’s rare that a single component can completely ruin an entire bike’s design, but that’s exactly what we’ve got here. The ’07 KTM 690 sports a mostly plain, off-road-inspired vibe that admittedly looks okay, but move to the front of the bike and you have, what can only be described as, one of the most hideous noses/beaks/fenders ever. The exhaust doesn’t get mesh with the rest of the visual theme, and the area under the tank looks like a bit of an afterthought. For all these reasons—plus the fact I can't help but be reminded of Spy Vs Spy when seeing it—the 690 makes the list.