what is yzf acronym?

It was a true revolution and it appeared by surprise. The Genesis 5-valve-per-Cylinder road bikes were used in the engine. The stroke was shorter, with a light titanium valve and a light piston, allowing a higherrpm, quicker reactions and more compact dimensions.

The first rider to use it was Doug Henry. He won the American Supercross in Las Vegas. The world wanted to see and test the long-awaited YZ400M because of the fact that the Supercross discipline required light motorcycles with quick reactions.

Henry achieved victory in the Motocross Championship the same year that 4-stroke motorcycles were confirmed to stay.

In 1998, the YZ 400F was born.

The first production 4-stroke motocross bike from Yamaha featured a YZM-inspired engine and its own Chassis, as the racing model used an adapted 2-stroke Chassis. It was a great success in sales and in competition. Bartolini won the 500 World Championship. In this category, the leading bikes were the preserve of Husaberg and Husqvarna with more than 500cc, but the light Yamaha with its engine of only 400cc overcame them in all circumstances.

The YZ 400F became the YZ426F in 2000.

The engine was improved and the weight was reduced, but the chassis was not. The YZF's reputation for easy-to-use and powerful bikes continued to grow, with good results in the Championships on both sides of the Atlantic.

The YZ250F was the first 4-stroke motorcycle to be launched and Yamaha was ahead of the competition. The germ that woke up the rest of the brands was that it was designed to compete against 125s.

The YZ426 had good results, but a leading rider was needed for the bike to be in front, and the 250 2T often put it in trouble, and there were some skeptics of the technology.

The YZ250F was better than the 125 in all aspects, and riders who weren't usually at the top got good results. The sales figures exploded all over the world after an unknown Ernesto Fonseca won the West Coast AMA Supercross with ease in 2001, showing that the bike was also suitable for demanding American discipline.

The first YZ450F was launched in 2003 and the World Championship categories were standardized in MX1 and MX2 instead of the mythical 500cc.

The second generation of YZF had a 450cc engine that was capable of developing raw power, and a new, lighter body. We could only use third gear on most circuits with a 4-speed gearbox.

Chad Reed had to fight with the greatest pilot in the history of Motocross, Ricky Carmichael, which prevented him from winning any Championship but he obtained very good results on its back.

The biggest rival to the YZF has ever been launched by Honda. The rival brand had a very powerful and compact engine.

Suzuki launched the RMZ 450 with an aluminum frame and the market demanded an aluminum Yamaha 4-stroke, since 2-strokes did have a chassis of this material.

The first aluminum Yamaha YZF appeared in 2006

The steel model had a heavy weight, but now it has a lighter weight model with a 5-speed transmission. The Kayaba SSS fork, a system that is mounted today and has given the YZF fame as being the motorcycle with the best suspension in production condition, was debut. The evolution cycles on the YZF were created with this model. The YZF won the World Championships in 2006 with Tony Cairoli and David Phillipaerts, and the American Championships with James Stewart and Grant Langston, being one of the most golden times of the saga.

The novelty was electronic injection.

The system was already on the bikes of Honda, Kawasaki, and Suzuki. Yamaha decided to go its own way in designing a dirt bike, and distanced itself from other manufacturers by including injection and reverse cylinder.

The system allowed to center the mass in a more effective way and make the air circulate in the engine in a more natural way, flowing in the same direction of travel. The bike had a different weight distribution because the tank and air filter box had to be swapped.