Browsing tag

Duncan Racing


By the staff of Dirt Wheels PROJECT YAMAHA YFZ450R We are fortunate enough to find ourselves around some of the most epic ATV builds in the business, and this Baja Yamaha YFZ450R is one for our record books. Pro-Am WORCS racer Ricardo Gonzalez wanted to switch gears and race the wilds of Baja Mexico with […]


 By the staff of Dirt Wheels, Photos by Pat Carrigan —   PROJECT YAMAHA YFZ450R Duncan Racing International (DRI) is a company known for building great products and building up ATVs to handle the harshness of racing in all different disciplines. One well-known racing series on the West Coast is WORCS. The Grand Prix-style courses […]


25 YEARS AGO IN DIRT WHEELS It was quite a sight as you sat there watching from a comfortable seat. A pack of quads and riders lined up on the starting line, revving the engines of their finely tuned machines. Then, they’d all take off in a roar racing to the first turn. A little […]


DUNCAN RACING STEERING STABILIZER One of the things that can tire you out on a ride is the handlebars twitching back and forth. This is especially true with high-performance quads with wider A-arms and long travel suspension. As you’re moving quickly down a trail the front tires are deflecting off of rocks, roots and ruts, […]


The Dirt Wheels crew will ride a box-stock quad for awhile, but then we start thinking about ways to improve its performance. Building project quads is a way of life for us. Here is a list of some that made it into the Dirt Wheels Project Quad Hall of Fame. Click on the links above […]


Over the years we have tested many fully built machines that we have given rave reviews over and some we haven’t liked much at all. Since the new sport ATV world is stagnant at the moment, we have been building plenty of older machines that prove that they are still very worthy of competing. Our […]

PROJECT ATV: Duncan Roll Designed Honda TRX250R Lobo

Before Honda came out with the TRX450R in 2004, the 1988–’89 250R remained the king of many circuits, anywhere from the tight woods of the GNCC series to the wide-open deserts of Baja. Since the 250R hadn’t been produced in decades, machines were far from stock. One of the best chassis builders of that time […]

PROJECT ATV: Duncan Racing TRX450R Sand Slinger

Building a perfect duner is a matter of heritage, style and power preference. For years the Yamaha Banshee was the machine of choice for sheer power and its exhilarating ride. Oddly enough, with all the two-stroke resurrection we are seeing lately, the Banshee is not as popular as the Suzuki Quadzilla 500 or Honda 250R. […]

PROJECT ATV: Duncan’s Honda 450R Racer

Score International’s Baja 500 takes place every June across the deserts and over the mountains near Ensenada, Mexico. It’s the hardest desert race to win. While the Baja 1000 may seem tough, it’s not. Ride the 1000 at a moderate pace, have no mistakes or breakdowns, and the race is yours. To win the 500, […]

PROJECT ATV: Suzuki LT-R450 Restore – Duncan Racing

Back in 2005 and 2006 when the sport quad industry was booming, every manufacturer was in a race to come up with the best performance 450 around. First was Yamaha, and then came Honda with their trailready 450s. Suzuki shocked the industry by coming out with the first production sport ATV with a 50-inch-wide stance […]