Month: February 2016

Fuel injected engine

The YZ250F benefits from an advanced fuel injection system that delivers excellent power characteristics, instant response and plenty of grunt. It adopts the same functional and integrated design concept as the YZ450F. For stronger mid range power, the 2015 engine features revised settings for the FI and ignition.

Rear-slanted, forward thinking

The forward-positioned straight intake ensures excellent efficiency while the rearward slant of the engine is set at the optimum angle with regard to the frame, engine size and mass balance. The full extent of the ECU can be exploited through the optional MX Power Tuner to customise set-up for personal preference and terrain conditions.

Centralisation and weight saving

The snaking exhaust design allows the use of a stubby silencer which, in turn, permits the fitment of a short subframe – just one of several factors contributing towards the significant mass centralisation of the motorcycle. The central fuel tank keeps the bodywork slim and the easily accessible air filter features quick-release fasterners.

Compact lightweight chassis

The YZ250F is renowned for its potential in turns and benefits from a lightweight, hydro-formed, bilateral beam frame constructed from ten different types of forged, cast and extruded aluminium parts. Achieving precision and control, the chassis blends high levels of rigidity, balance and shock absorbing element for ‘ultimate’ feedback and fun.

Smooth and efficient shifting

The durable clutch and slick shifting transmission ensure that YZ250F riders experience a smoother, surer shifting sensation. This advanced system reduces drive-force losses during gear changes, allowing the rider to optimise the engine performance for reduced lap times.

This bike is built to race hard and its sharp, minimal bodywork gives you optimal freedom of movement during intense competition. The long seat and hidden filler cap allow rapid body weight transfer – and with its new factory style in-mould graphics and black rims, the 2015 YZ250F is ready for action!

Sharp minimal bodywork

Revised 450cc engine

The fuel injected, 4-stroke, 4-valve, DOHC, rearward-slanting single cylinder engine now boasts more controllable power. Formidable ECU performance combined with new gear ratios mean plenty of easy-to-use torque with a strong push from third gear up. A reworked gearshift-system reduces drive-force loss and ensures smoother shift operations.

Brand new bilateral beam aluminium frame

Increased feedback thanks to a chassis direct from the YZ250F. The new irregular exhaust silencer permits a shorter subframe achieving a more central riding sensation. Suspension improvements with new coil springs coupled with larger 22mm front axle augment the YZ450F’s ability to grip the dirt.

Saving and shaving weight

The combination of the new frame and design overhaul of other elements on the YZ450F has led to weight reduction and light-weight feel. The use of a wet sump lubrication system removes the need for an oil tank while a rejigged radiator form and shortened subframe are other examples of how the YZ450F has been trimmed and honed.

Centralisation at core

The 2014 YZ450F conveys the best sensation yet of mass centralisation and therefore superior usability. Immediately noticeable is the repositioning of the 7.5l fuel tank further inside the motorcycle. The new unit still enables easy access to the air filter for better serviceability. This is YZ450F performance and power in a YZ250F housing.

New looks for new age

Minimal, economic and sharp lines adhere to a ‘smash movement’ design concept. The look shouts ‘race me’ and is helped by new side panel plastics, air scoop and rear mudguard. Also for the first time ever on a Yamaha motorcycle ‘in-mould’ graphics technology has been applied to the bodywork for a translucent look and a more resistant surface.