as those are the four-stroke engine sizes permitted in AMA Supercross, Pro Motocross, and the SuperMotocross (SMX) World ...

Related: How To Size a Dirt ... bikes. MSRP is $4,049. Related: 2023 Kawasaki Trail Bikes First Look 2023 Yamaha TT-R230 Yamaha’s TT-R230 is powered by an air-cooled 223cc four-stroke engine ...

Single-cylinder motorcycles represent motorcycling in its simplest form. It is by quite some margin the most popular engine ...

In the exhaust stroke, the exhaust valve is open and the combustion products are expelled from the cylinder. The sequence shown on the next page represents this behavior for a Mitsubishi direct ...

Suppose you are in the market for a dirt bike. In that case ... and increased in size from 240 mm to 250 mm. In addition, a 4-stroke engine powers it. The bike is made partly of cast aluminum, making ...

Generally, a 125cc two-stroke or a 250cc four-stroke dirt bike will suit a beginning rider better than something with more (unnecessary) power. Avoid the biggest motor 450 Motocross bike, because ...

Porsche patented a 6-stroke engine Outside of early Saabs, most gas-powered car engines are a 4-stroke Porsche's 6-stroke patent seems to indicate it could eke more power out of an engine Unless ...

it’s a six-stroke engine that relies on a different stroke length for one of the strokes. The first three strokes are very like those in a four-stroke: intake, compression, ignition/expansion.

You may have heard your car has a four-stroke engine, but you're not sure what that means. Why are there four? And what is a stroke, anyway? A modern gas engine most commonly uses pistons and a ...

It's been a long time since the automotive world has bothered with the mixing of oil and gas of the two-stroke combustion cycle — but soon, it may come time to rid ourselves of four-stroke ...