Genesis engine
Encyclopedia
Genesis is an engine design by the Yamaha Motor Corporation that debuted in the 1984 Yamaha FZ750
.
The engine employs a DOHC design and uses five valves per cylinder with the cylinder group slant forwards 45 degrees. It used downdraft carburetors instead of the side draft carburetors that were more common at that time.
The same engine is used in the Yamaha FZX700 model, a naked bike that was introduced in the USA in 1986. Originally the engine was 750cc [FZ750], but due to import restrictions 700cc was considerably cheaper, and therefore produced instead.
For more than ten years, until the 2007 model year, the Yamaha YZF-R1
used a 5-valve head and downdraft intake design.
The flexible design of the engine, allow Yamaha to use it on a variety of configurations, allowing Yamaha to use it from Sportsbikes to high performance Outboards motors.
When the engine was introduced, it used downdraft carburetors on the entry level Yamaha FZ750 sportbike, in a 20 valve configuration, using three intake valves and two exhaust valves per cylinder. The engine has evolved on the different bikes that Yamaha has used it for during the past several years to fill different kinds of markets, from the Supersport Yamaha's YZF-R6 and YZF-R1 using electronic fuel injection with YCCT an YCCI to the less extreme but still powerful Yamaha FZ6 and FZ1 Fazer line, using a simpler fuel injection schemes but essentially the same basic engine design. The most significant changes made were the 4 valves per cylinder configuration and the crossplane crankshaft found on the YZF-R1 2009, along with the change of cylinder sleeves to steel for the high precision and high temperature durability. Performance and reliability have made this engine design a total success over its long life.
Because of its high performance capacity (usually from 100 BHP 350 BHP), the engine has also been employed in various other uses such as gyroplanes and high power marine engines, making it an affordable solution for a high performance applications.
Yamaha FZ750
The Yamaha FZ750 is a sport motorcycle produced by Yamaha Motor Corporation between 1985 and 1991. The FZ750 is notable as predecessor of the highly successful Yamaha FZR1000.- Development :...
.
The engine employs a DOHC design and uses five valves per cylinder with the cylinder group slant forwards 45 degrees. It used downdraft carburetors instead of the side draft carburetors that were more common at that time.
The same engine is used in the Yamaha FZX700 model, a naked bike that was introduced in the USA in 1986. Originally the engine was 750cc [FZ750], but due to import restrictions 700cc was considerably cheaper, and therefore produced instead.
For more than ten years, until the 2007 model year, the Yamaha YZF-R1
Yamaha YZF-R1
The Yamaha YZF-R1 is an open class sport bike, or superbike, motorcycle manufactured by Yamaha Motor Company since 1998.-1998–1999:Yamaha launched the YZF-R1 after redesigning the Genesis engine to offset the crankshaft, gearbox input, and output shafts. This "compacting" of the engine made the...
used a 5-valve head and downdraft intake design.
The flexible design of the engine, allow Yamaha to use it on a variety of configurations, allowing Yamaha to use it from Sportsbikes to high performance Outboards motors.
When the engine was introduced, it used downdraft carburetors on the entry level Yamaha FZ750 sportbike, in a 20 valve configuration, using three intake valves and two exhaust valves per cylinder. The engine has evolved on the different bikes that Yamaha has used it for during the past several years to fill different kinds of markets, from the Supersport Yamaha's YZF-R6 and YZF-R1 using electronic fuel injection with YCCT an YCCI to the less extreme but still powerful Yamaha FZ6 and FZ1 Fazer line, using a simpler fuel injection schemes but essentially the same basic engine design. The most significant changes made were the 4 valves per cylinder configuration and the crossplane crankshaft found on the YZF-R1 2009, along with the change of cylinder sleeves to steel for the high precision and high temperature durability. Performance and reliability have made this engine design a total success over its long life.
Because of its high performance capacity (usually from 100 BHP 350 BHP), the engine has also been employed in various other uses such as gyroplanes and high power marine engines, making it an affordable solution for a high performance applications.