The two-stroke power valve system is an improvement to a conventional two-stroke engine that gives a high power output over a wider RPM range. A stroke...

series from Yamaha to receive the 'YPVS' Yamaha Power Valve System. A different version of this motor with no YPVS was also used in the Yamaha Banshee 350...

natural replacement for the popular RD 250/Yamaha RD350LC series of the 1980s. It has the Yamaha Power Valve System 'YPVS' which raises and lowers the exhaust...

generation TZR250 (this same engine also powered the R1-Z). This engine featured the 'YPVS' Yamaha Power Valve System, CDI ignition and digital spark advance...

with a self-diagnosis system and digital speed readout. The exhaust used Yamaha's Exhaust Ultimate Power Valve (EXUP) system, which controlled exhaust...

Linked Yamaha YPVS exhaust power valves are controlled by a single electronic unit and servo motor and are designed to give a broader power band. The...

Yamaha Power Valve System (YPVS). The first model series (TZ 250 A) of the water-cooled twin with contactless thyristor magneto ignition had a power output...

Deltabox frame introduced three years earlier on the 1WG FZR400. The four-valve Yamaha FZR600 engine was slanted forward in the frame. This was the basis of...

making five-valve Genesis engines for several years, Yamaha has since reverted to the cheaper four-valve design. Examples of the five-valve engines are...

butterfly valves. The V-Boost system adds 10 percent to the top power rating of the base engine. In 2005, at the 39th Tokyo Motor Show, Yamaha displayed...

In 1997 Yamaha introduced the Aerox to the European market. It came in two models, the 2-Stroke 50 cc (Internally known as the YQ50) powered by the Minarelli...

power dilemma by borrowing superbike technology and giving the YZ a five-valve head, liquid cooling and a 12.5-1 compression ratio. In 1997, Yamaha rocked...

The Yamaha YZR500 was a 500 cc Grand Prix racing motorcycle made by Yamaha from 1973 through 2002. It achieved significant acclaim, especially during the...

with the Derbi. It uses the Yamaha Yamaha Power Valve System, a two-stroke power valve system, which consists of a rotary valve located in the exhaust port...

bore and stroke of its predecessor, the Yamaha RD350LC. Yamaha debuted their breakthrough YPVS power valve system that revolutionized the two-stroke engine...

the engine. Yamaha was the first to develop such a system, called the Exhaust Ultimate Power Valve (EXUP). It first appeared on the Yamaha FZR EXUP and...

air-cooled, overhead valve V-twin engine but sportbike or naked bike style frame and suspension. The engine is derived from the Yamaha Warrior XV1700 and...

model its commonly used name was Yamaha's four-stroke power valve system EXUP valve, a servo-motor-driven exhaust valve. This allowed large bore exhaust...

short-stroke 97cc Yamaha RS100DX produced from 1977. This was an RS100 (itself a 1976 improvement upon the design of the original reed-valved 96cc RS100 that...

several reasons, perhaps the most radical being the 5-valve cylinder head. This became something of a Yamaha trademark. The FZ750 would be the first bike in...

is the first Yamaha cruiser motorcycle to be equipped with the compact Exhaust Ultimate Power Valve (EXUP) four-stroke power valve system previously only...

The Yamaha YZR-M1 is an inline-four motorcycle specifically developed by Yamaha Motor Company to race in the current MotoGP series. It succeeded the 500 cc...

the US but was available in neighboring Canada. Yamaha debuted their breakthrough YPVS power valve system that revolutionized the two-stroke engine in the...

automotive manufacturers to use VVT systems. Two-stroke engines use a power valve system to get similar results to VVT. The valves within an internal combustion...

kits to give more power to the engine. The heavily finned, air-cooled Blaster engine has roots from a water-cooled machine (Yamaha DT200), as evidenced...

The Yamaha YZF-R15 is a single-cylinder sport bike made by Yamaha Motor Company in 2008. In September 2011, the second iteration, called v2.0, was released...

complemented with "Variable Valve Actuation" system. In September 2023, the 155 cc model of the T-150 received a minor redesign. Yamaha Exciter 150 (called in...

The Yamaha YZ250 is a two-stroke motocross race bike made by Yamaha. The model was launched in 1974, and has been regularly updated and is still in production...

V.S. power valved (electronically operated power valve system while motocross bikes are equipped with mechanically operated power valve system),flat...

counterparts despite their higher power rating and a lower curb weight. Yamaha designed the engine for performance; the valve angle was a relatively wide 50 degrees...