The most popular Dirt Bikes are those manufactured by Honda, Kawasaki, Suzuki, Yamaha, and KTM. Some of these products can be very expensive since their demand is very high with professionals and amateurs alike.

When Kawasaki started mass-production of perimeter frame Dirt Bikes in 1990, the two-stroke, single-cylinder 249cc engine KAWASAKI KX250, along with KX125 became the first ones to be manufactured. A new KX250 can cost you around 6,000 dollars while you can get a used KAWASAKI KX250 for 1500 to 3000 dollars. A KX125 costs slightly lower.

The 449cc, liquid-cooled, single-cylinder, four-stroke Honda CRF450R is rated highly by owners due to its versatility, speed and power. This motorcycle costs around 6,000 to 7,000 dollars. However, not all Honda Dirt Bikes are as expensive. The HONDA CR 250 Motocross Dirt Bike, for example, costs only around 2000 to 4000 dollars.

Suzuki has been manufacturing a series of Dirt Bikes called DR-Z and a recent addition to this family is the Suzuki DR-Z125, available in two versions - DR-Z125 and DR-Z125L. These 124cc, 4-stroke, single-cylinder models feature the traditional, five-speed transmission and the 2004 models cost 3,000 dollars.

The Yamaha YZ series is the most popular Yamaha Dirt Bike model. The 2006 models will cost you around 3,000 to 7,000 dollars or more than that. Of these, the 85cc, liquid-cooled, reed valve-inducted, 2-stroke YZ85 is the cheapest (3,099 dollars) while the 4-stroke, DOHC, 5-valve titanium, liquid-cooled engine YZ450F costs around 6,500 to 8,000 dollars.

The most popular KTM Dirt Bike, the KTM 200 EXC, has power band of the 200cc engine but weighs similar to a typical 125cc Dirt Bike. The KTM 200 EXC costs around 6,000 dollars. KTM also has a similarly popular family of Dirk Bikes the KTM SX series. There's not much difference in price between the EXC and the SX series and they continue to some of the most popular off-road vehicles.