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The Bike - YZ250FM

2014 YZ250FM

2014 sees a new beginning for Yamaha’s pacey and capable YZ250F as a re-visualised engine concept and totally new motorcycle brings the YZ range closer together for the modern era of off-road racing. The YZ250F has now enjoyed more than a decade as one of the prime competition models of MX2/250SX/250MX at the highest level. On its inception in 2001 it instantly established a new creed of motocrosser - the 250cc four-stroke - paving the way for the latest generation of MX2-GP class machines. In 2011 the YZ250FM factory bike at Grand Prix was a works prototype with an advanced fuel injection system and the development and work completed by YRRD (Yamaha Rinaldi Research and Development) and Yamaha through two seasons of action has helped forge the latest and most exciting production version of the YZ250F.

Yamaha 250cc four-stroke was an instant hit on its world championship introduction in 2003, dominating the second half of the 125 championship with Stefan Everts and claiming eight from nine races, scooping the manufacturer’s crown. In the first year of the MX2 category in 2004 the bike was again gracing the top step of the podium. The following campaign Italian Antonio Cairoli obtained a maiden title for the machine on an YZ250F. He repeated his success in 2007 after finishing runner-up in ’06.

The YZ250F race-bike was updated for 2009 and for 2010 the bike was again modified with a brand new engine, styling and centralisation of the chassis. In 2011 YRRD (Yamaha Rinaldi Research and Development) embarked on an ambitious new prototype engine project including fuel injection and celebrated a Grand Prix victory and six further podium trophies with Gautier Paulin. 2013 witnessed the third version of that prototype hit the tracks in the hands of Christophe Charlier and the Corsican took full advantage of the material to own two GP motos (in Sweden and Great Britain).

The YZ250F already has an excellent pedigree as a formidable racing tool at any level. In the last half a decade the motorcycle has celebrated two EMX250 European Championships (Charlier and Pocock), various national championship including two British National crowns (Osborne and Tonus) as well as the Australian domestic MX and SX series (Luke Styke in 2013). Yamaha Rinaldi Research and Development kit parts were key in the technical assistance that Kiara Fontanesi received in order to win her – and Yamaha’s – first ever FIM Women’s World Championship in 2012 and the Italian successfully defended the title in 2013.

Main titles
2001 - Ernesto Fonseca – YZ250F (AMA-SX Lites West Coast)
2002 - Chad Reed - YZ250F ((AMA-SX Lites East Coast)
2004 - Chad Reed - YZ250F (AMA-SX)
2005 - Antonio Cairoli - YZ250F (MX2)
2007 - Antonio Cairoli - YZ250F (MX2)
2008 - Jason Lawrence – YZ250F (AMA-SX Lites West Coast)
2009 – Christophe Charlier – YZ250F (EMX2)
2012 - Kiara Fontanesi - YZ250F (WMX)
2012 – Mel Pocock – YZ250F (EMX2)
2013 - Kiara Fontanesi - YZ250F (WMX)

2014 is another memorable year in the life span and trajectory of the YZ250F. The motorcycle is completely overhauled to bring the machine closer in technology, components and spirit to its bigger brother, the YZ450F. The new rear-facing, ‘snaking’ exhaust, fuel injected engine concept was the most significant revision but a new chassis to compliment the great tractability and centralisation (not to mention a slim and athletic ‘new look’) brought the bike right up to 21st century racing and track presence.

The factory team led by Michele Rinaldi will again enter a prototype machine with the 2014 production YZ250F providing an excellent base from which to start. In the MX2 class – where the search for maximum power and performance never seems to cease – works racer Christophe Charlier will benefit from the latest work by YRRD technicians to boost output from the 250cc ‘heart’ of the YZ250F. As a spin-off Yamaha Motor Europe decided to make some of the factory developments also available in a special YRRD GP engine kit to the Belgian Kemea Yamaha team for their riders Petrov and Styke. The Bike It Yamaha Cosworth team, marshalled by Steve Dixon from the UK, continues to work with Cosworth to prepare the YZ250F for their MX2 GP campaign.

Teams and racers on circuits across the continent benefit from the acclaimed YRRD race kits with engine upgrades and components designed to allow the YZ250F to operate at the peak of its performance. 
For more details click here.

2014 YZ250FM Detail
YRRD Cylinder head
YRRD Camshaft
YRRD Crankshaft
Racing spec exhaust pipe
Programmable ECU
YRRD transmission
YRRD connecting rod
YRRD Piston (Vertex)
Ignition cover (Magnesium)
Clutch cover (Aluminium)
Hydraulic clutch
Second injector

Engine Extrernal:
Akrapovic exhaust pipe: GP FIM Spec
GET programmable ECU (with GPA)
Supersprox front and rear sprockets
Regina chain
DT-1 air filter
Hinson clutch parts
Innteck seals and bush
Vertex pistons

Factory spec triple clamp
Factory swingarm
YRRD rear brake pedal
Front and rear suspension
Carbon fuel tank
Various titanium parts; footrest, bracket, bolts etc.
Various carbon parts; covers, protectors etc.

Chassis External:
Xtrig triple clamps
Braking front disc (270mm/280mm depending on the track)
Braking rear brake disc (245mm)
Kite front and rear hubs
Pirelli tyres
WRP handlebars
UFO plastics
Progrip grips
Blackbird stickers and seat cover
CRM carbon parts

Yamaha Factory Racing MXGP Team Technical supplier list:
Braking CRM Compositi

Related Photos
Quick View Standings Results
1 Herlings 50
2 Lieber 42
3 Ferrandis 38
4 Gajser 32
5 Tonkov 31
6 Jonass 30
7 Seewer 29
8 Guillod 28
9 Tixier 27
10 Covington 21
18 Paturel 5
23 Graulus 2
Race 2 Qatar 28/02/15
1 Herlings 33.56.61
2 Lieber 0.02.73
3 Tonkov 0.05.07
4 Jonass 0.10.89
5 Ferrandis 0.11.09
6 Guillod 0.18.51
7 Gajser 0.20.69
8 Seewer 0.26.73
9 Tixier 0.30.80
10 Covington 0.54.20
19 Graulus 6 Laps


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