Tests

2019 Yamaha YZ250F Dyno Test

How much power does Yamaha’s 250 four-stroke motocross bike make?

February 22, 2019

Video By: Bert Beltran

The 2019 Yamaha YZ250F has a starting suggested retail price of $8,199 and is available in Team Yamaha Blue and White. Powering this Japanese motorcycle is a liquid-cooled, DOHC, four-valve, 250cc four-stroke engine.

We ran the YZ250F on our rear-wheel dyno in third gear to determine peak output from Yamaha’s 250F motocross bike. We documented 37.45 hp at 12,390 rpm and 18.53 pound-feet of torque at 8,440 rpm.

2019 Yamaha YZ250F Dyno ChartDirt Rider Staff

“The YZ250F engine is almost 450-like. It makes good bottom-end power, has a very strong midrange, and decent top-end.”

- —Andrew Oldar

Engine Specifications


Engine Type:	Liquid-cooled, DOHC, four-stroke single-cylinder; 4 valves/cylinder
Bore x Stroke:	77.0 x 53.6mm
Displacement:	250cc
Compression Ratio:	13.8:1
Fuel Delivery:	Electronic fuel injection