A work of art; this cutaway image of the all-new R1 engine reveals just how much technology has been built into such a compact unit.
The R1 engine development team left no stone unturned when building the new 200PS crossplane engine powering the all new YZF-R1.
The R1’s crossplane crankshaft benefits from 20% less inertial moment than the current model, promoting a true 1:1 relationship between the throttle and rear tyre.

Instant Power with Direct Control

19 Mar 2015

To achieve the YZF-R1’s goal of creating a totally new 'High Tech Armed Superbike’, Yamaha developed an all-new lightweight and compact engine that’s unlocked a new era in high performance motorcycle design.

The lighter, more powerful 998cc inline 4-cylinder engine in the 2015 R1 features a newly designed crossplane crankshaft that benefits from 20% less inertial moment than the current model. This technology gives a truly connected 1:1 relationship between the throttle and rear tyre – as well as an intuitive character that enables the R1 rider to exploit the high power output of the new YZF-R1 to its full potential.

The successful crossplane concept was originally developed for our MotoGP bikes with input from Valentino Rossi, and the next generation R1 continues to benefit from this innovative technology. The crossplane engine's uneven 270° - 180° - 90° - 180° firing sequence gives each piston and con rod its own individual and separate movement to create a stronger low-to mid-range pulse. This race-bred engine is also characterised by its exceptional exhaust growl.

Using advanced technology first seen on our YZR-M1 MotoGP machines, the new engine benefits from a range of features that are designed to increase air intake volume while at the same time reduce power losses. The use of this cutting-edge technology in every area of the new engine's design and construction has succeeded in achieving a maximum power output (without ram air pressurization) of 200PS.

The current model engine won all the plaudits last year, carrying Josh Hayes to an incredible fourth AMA title as well as claiming the 2014 World Endurance Championship. For 2015, the new engine is faster and lighter, with more torque and greater control. Below is snapshot of each integral component that takes the new R1’s engine to the next level in high performance motorcycle design.

YZF-R1 Engine – Technical highlights

  • New 998cc crossplane in-line 4-cylinder, 4-valve engine
  • New crossplane crankshaft design reduces up to 20% inertial moment to deliver exceptional linear torque output
  • New maximum power output of 200PS (without ram air pressurisation)
  • New 79.0mm x 50.9 mm bore x stroke, high compression ratio of 13.0:1
  • First for production lightweight titanium fracture-split con rods reduce weight by up 40%
  • Lightweight forged aluminium bridge-box pistons
  • Large diameter valves and high efficiency intake ports
  • Rocker arm valve drive with diamond like carbon (DLC) coating
  • New advanced 2-directional 12-hole injectors work in unison with the new R1’a Yamaha Chip Controlled Throttle (YCC-T) – see this technology in action by clicking here.
  • Low-tension piston rings
  • Piston pins with diamond like carbon (DLC) coating
  • Newly designed 4-2-1 titanium exhaust system with large capacity 5.2 litre chamber creates an all-new level of performance and an M1-like growl – see this technology in action by clicking here.
  • New 10.5L airbox is 23% larger than the design used on the current model to deliver increased volumes of fresh air into the Yamaha Chip Controlled Intake (YCC-I) funnels – see this technology in action by clicking here.
  • A new assist and slipper (A&S) clutch in the new R1 is 7% smaller in diameter and 19% lighter than the current model's clutch.
  • New high efficiency lubrication system design cuts power losses and contributes towards new R1's high output due to a sunken bottom oil pan design that lowers the surface level of the lubricant – see this technology in action by clicking here.

For more detail on the technology and components listed above head over to http://www.yamaha-motor.co.nz/NewR1.

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