Browsing Tag

Duncan Racing

25 YEARS AGO IN DIRT WHEELS

-- Remember the Mickey Thompson Grand Prix Series? -- 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 bumping and shoving might send a rider or two over the berm, but the rest would go sailing over jumps, flying across the whoops, roosting around the turns and fighting to be first to the finish line. This was the exciting…

PROJECT YAMAHA YFZ450R

-- Duncan Racing is at it again --  By the staff of Dirt Wheels, Photos by Pat Carrigan -- 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 offer rough desert terrain, sand dunes, asphalt, motocross tracks and more to battle through, which means your quad must be tough to take the abuse and win. Mike…

DUNCAN RACING STEERING STABILIZER

-- Their GPR unit is the hot ticket for sport quads -- 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, which kicks the bars as you're trying to hang on. The best solution to that is a steering stabilizer. This is a small aluminum container device that has hydraulic fluid with a wiper…

TOP PROJECT ATVs

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 each picture to go straight to the articles. PROJECT HONDA TRX400EX BUDGET BUILD PROJECT HONDA ATC 250R REBUILD PROJECT RAT ROD QUAD PROJECT RACE WALSHZILLA VS. CRF450R PROJECT HONDA TRX450R SAND SLINGER PROJECT DUNCAN SUZUKI…

PROJECT ATV: Duncan YFZ450R

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 last build with Golden West Cycle and Duncan Racing turned out very well. The WORCS-style Honda 450R we built was great on the track, trail and in the dunes. Afterwards, we contacted Duncan to build us a full MX-style YFZ450R with…

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 was Doug Roll. Roll, a racer himself, engineered a complete frame and suspension setup called the Lobo that some say was far superior to the competition. There was such high demand for the parts in the late ’90s,…

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. The duner we are featuring this month was built around a newer Honda, the four-stroke TRX450R. Its owner, Thad Dirksen, let the legendary builder at Duncan Racing turn it into his perfect duner. When you…

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, not only does your 10–11-hour run have to be flawless, your machine has to be reliable and fast. Because at this event, the competition runs wide open and rarely slows down to save equipment. Every nut and bolt has to…

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 that meant the machine was track-ready. Suzuki built this machine with the help of industry experts like Wayne Hinson and racer Doug Gust. With its release in 2006, the LT-R450 quickly became the quad amateurs and…