Light, powerful, fun and pro-grade, the 2013 Yamaha YZ250 is a 2-stroke MX motorcycle which can be taken to the track right from its crate. It is animated by the 2T version of the YZ250F engine ...

Yamaha bupd the YZ250 with the same engine 250cc liquid-cooled reed-valve-inducted two-stroke engine is lightweight, compact and features an incredibly wide, hard-hitting powerband. New 270mm ...

The backstroke was first contested at the 1900 Paris Games. Current Olympic distances are 100m and 200m. The breaststroke is a highly technical stroke and is therefore difficult to master. It is the ...

Then there was a slowdown when motorcycle manufacturers started focusing on four-stroke development, and some like Honda ... The red Austrian bike has a price tag of $8,349. 2023 Yamaha YZ250/YZ250 ...

starts with the piston at the top of the cylinder (TDC) and the intake valve open to admit air and fuel. At bottom-dead-center (BDC) the inlet valve is closed and the compression stroke (b) starts.

(Robert Martin/) The four-stroke spark-ignition internal combustion engine, invented by Nikolaus Otto in 1876, was a big step ...

New Laser-Based Headset Can Measure Blood Flow, Assess Risk of Stroke Sep. 30, 2024 — Researchers have developed a laser-based device that can measure blood flow noninvasively and differentiate ...

Along with a TIG welder and mechanical ingenuity bordering on genius-level, all of which come to bear on this fridge compressor to four-stroke engine build. The video posted by [Let’s Learn ...

Two new four-stroke rammers, known for improved fuel efficiency, reduced emissions, and lower operating costs, have been launched to the South African market. The new models are said to represent ...

Disruptions of blood circulation to the brain may result in a stroke. It occurs in two forms, both potentially life-threatening. If you or someone with you exhibits signs of a stroke, do not delay.

Pekic/Getty Images New research has linked drinking more than four cups of coffee a day with a 37% higher risk of stroke. Frequent consumption of carbonated beverages was also linked with ...