YZR-M1 TECHNICAL PRESENTATION- The evolution of the YZR-M1 during the 990cc period -

Contents

Development objectives YZR-M1

Evolution of the YZR-M1 during ’02 / ‘06

YZR-M1 development in 2006

Conclusion

Development objectives YZR-M1

Chassis

Maximize agility

Engine

Best balancePower and Drivability

EMS

Direct Natural Feeling

YZR-M1 Concept

Engine Brake Control( ICS System )

2002

2003

2004

Uneven firing order4-valve engine

2005Frame without cross member

2006

- Fly-by-wire (FBW) throttle system

- Start Control System

Evolution of YZR-M1

Development objectives of YZR-M1

Short wheelbase

Longswing arm

Mass centralization

Low dragfairing

Well balancedframe

Chassis Engine

High REV & High power

Compact & Light weight

Engine Management System

Ridable Torque Control

Natural feeling engine brake

High reliability

Better fuel economy* Compared to 2005

Chassis

Air intake passage

’02 - ’04 ’05 - ’06

Evolution of frame

No cross member

Evolution of aerodynamics

Front: Decrease CD*A means more speed and acceleration.

Side: Decrease yaw characteristics means better agility .

These 2 subjects are incompatible .

Mass centralization

Change of fuel tank

20032005

Engine constitutionWell balanced4 axis location

The relocation of elec. parts( ECU, Data logger )

Below meter panel On the tank railShorten AXLE distance

PITCHROLL

YAW

Result of mass centralization

Mass centralization reduces bike inertia

Engine

In-line engine is best configuration to achieve M1 development objective

Engine configuration

Shorten AXLE Dist.

Shorter Wheelbase Longer rear arm

Evolution of engine specification

Betterridability

Short stroke5Valve

Even-firing Uneven-firing Gear Train

Morepower

4Valve

Evolution of engine performance

500cc

‘02

‘03 ‘04

‘05‘06

3000rpm increase

25Kw increase

38Kw Difference

Engine Management System (EMS)

Evolution of EMS

20022003

2004

20052006

Engine Brake ControlAir by-passClutch control Throttle

Engine Brake ControlTorque ControlTraction Control

Engine Brake ControlTorque ControlTraction ControlWheely ControlLaunch Control

ICS System

Fly-by-wire system

2006 YZR-M1 Development

< Chassis: More agility/stability >- New design frame

- Modified rear shock mount

< Engine: More power >- Change bore x stroke

- FBW throttle

Target of 2006 YZR-M1 Development

< EMS: Easier to handle >- New strategy of engine brake

- FBW Throttle control

Modification from 2005

Stiffer Rear Shock Mount

< Chassis > < Engine > < EMS >

F-B-W throttle

EG Torque ControlEG Brake ControlWheely Control

‘06‘05

Bore x stroke

More rev & power achieved

Qatar Test/Feb

R5 LeMans GP

R13SepangGP

R12BrnoGP

R4ChinaGP

R3ISTGP

IRTAJEREZ

Cha

ssis

Eng

ine

2006 Development flow of YZR-M1

Conclusion

1) YZR-M1 is designed and developed to achieve the best handling.This concept feeds back to production bikes YZF-R1, YZF-R6.

2) The adaptation of “uneven-firing” technology to the in-line 4 cylinder engine has made a big improvement in ridability. This technology is spreading in MotoGP.

3) Through 2002 – 2006 the engine management system has seen a lot of progress. Each year sees an increase in the number of items on the bike that are controlled by the EMS system.