How Much Power Does the 2023 Beta 300 RX Make?

Dyno testing Beta’s 300 motocross bike for horsepower and torque.

Most motorcycle brands with limited motocross bike offerings stick with 250 and 450 four-strokes, but not Beta. Its lone MX-focused model is a two-stroke called the 300 RX, which first hit the market in 2021 and is produced in limited quantities. The Italian company is also one of only two manufacturers to offer a 300 two-stroke motocross bike, the other being KTM.

Imagine our excitement when Beta offered us the opportunity to test its 300 RX. The first order of business was to run it on our in-house Dynojet 250i rear-wheel dynamometer. With a Dunlop D404 street tire mounted, its carbureted 293cc two-stroke engine sent 40.3 hp and 28.9 lb.-ft. of torque to the rear wheel.

“The Beta 300 RX’s counterbalanced engine package is more spread out and easier to ride than I ever expected,” test rider Casey Casper said. “It may not be the fastest 300 two-stroke production bike available, but it’s certainly the most user-friendly and adjustable for consumers of all ages.”

2023 Beta 300 RX Dyno ChartRobert Martin

2023 Beta 300 RX Engine Specs

Engine Type: Liquid-cooled, two-stroke single-cylinder
Displacement: 293cc
Bore x Stroke: 72.0 x 72.0mm
Compression Ratio: 11.6:1
Fuel Delivery: Keihin PWK 38mm carburetor