At last, a middleweight ATV that stands out! The 2009 Yamaha Kodiak 450 just got a serious makeover and deserves some serious consideration from ATV fans. First, it is one of the lightest models in its class, and second, it boasts an outstanding power-to-weight ratio. This well-designed machine also displays tremendous versatility with a happy combination of features, handling and performance.

The 2009 Yamaha Kodiak 450 is a great midsize ATV that is both light and powerful.

Responsive engine, sophisticated transmission
The Kodiak 450’s 421-cc single-cylinder heart shows its hot-tempered personality by letting out a bear-like growl when under pressure. Acceleration is always delivered instantly despite the absence of electronic fuel injection, with the carburetor working in synch with the continuously-variable “Ultramatic” transmission, whose pulleys, belt and motors are hidden inside a protective case.

And it works! The CVT performed flawlessly throughout the entire test, even when submerged in a mud pond. The belt never slipped despite facing some of the worst conditions I have ever encountered with an ATV. Moreover, engine braking is effective enough to nearly eliminate the need to use the regular brakes -- except during emergency maneuvers, of course. A balance shaft reduces engine vibrations and further enhances the riding experience. Meanwhile, the new, higher-mounted, higher-capacity radiator improves reliability and overall safety when you get off the beaten path.

The electronics in Yamaha’s Ultramatic gearbox technology allows you to switch between five different modes of operation, starting with Low (maximum torque for challenging, low-speed maneuvers) and High (optimum power for higher-speed riding). The other modes include Neutral, Reverse and Full Lock (exclusive to the Kodiak 450), which pretty much works like the “Park” position of an automatic transmission-equipped automobile.

You can also switch between 2WD to 4WD by engaging or disengaging the center differential. The latter can be fully locked (in Low mode only) so as to synchronize all four wheels when you need to crawl through particularly demanding sections. In normal riding conditions, a small safety lever prevents you from inadvertently switching to Low. Finally, engine speed is electronically limited in Reserve mode.

The electronics in Yamaha’s Ultramatic gearbox technology allows you to switch between five different modes of operation.