Yamaha Off Road Motorcycles - YZ85/LW


2019 Off Road Motorcycles

The YZ85 is a legend in the youth motocross scene. It’s the bike that inspired many of today’s top professional racers and helped them on their path to MX glory. And with its increased performance, the new YZ85 is the dirt bike that can turn young riders’ dreams into reality.

Victory. Never given, always earned

Its all-new 85cc liquid-cooled 2-stroke engine comes with a Yamaha Power Valve System (YPVS) that delivers a wider spread of explosive power giving genuine advantage over the competition.

And with fully adjustable forks, wave-type front and rear discs and adaptable ergonomics, the new YZ85 has the technology to launch riders all the way to the top.


•  Fully adjustable 36mm KYB® upside down front forks
•  Light and efficient large core radiator
•  New wave discs and brake hoses
•  Link-type Monocross rear suspension
•  New impact resistant fork guards
•  New aluminium swingarm for easy chain adjustment
•  4-position adjustable tapered aluminium handlebars
•  Sharp styling and factory inspired graphics
•  Plastic resin reed valve and new expansion chamber
•  New 85cc liquid cooled 2-stroke engine with YPVS
•  Close ratio 6-speed transmission
•  Increased compression ratio of 8.2-9.6:1


Yamaha Off Road Motorcycles - YZ85/LW

Powerful new 85cc engine with YPVS

The new 85cc liquid cooled engine features the Yamaha Power Valve System (YPVS) that boosts overall performance and contributes towards the bike’s easy to use torque. Running with a higher compression ratio – and equipped with a close ratio 6-speed transmission – the YZ85 delivers outstanding acceleration with race winning power.

Yamaha Off Road Motorcycles - YZ85/LW

Plastic resin reed valves and optimized exhaust

All-new high-performance intake and exhaust systems match the new YPVS so that optimum potential can be achieved as soon as the gate drops. Plastic resin reed valves and a new expansion chamber deliver controllable power with explosive acceleration – and a heart-stirring ripple – exactly when needed, to keep you way ahead of the competition.

Yamaha Off Road Motorcycles - YZ85/LW

Newly designed 36mm KYB® inverted forks

Featuring specially machined one-piece tapered outer tubes that aligns them well with the rigidity balance of the frame, and with 36mm inner tubes, the front forks provide optimized damping settings. Combined with the fully adjustable low friction cartridge forks, the YZ85 has the most sophisticated front fork design ever used on a youth YZ motocross bike. Fitted with newly designed fork guards, this high-tech front end is built to master even the most demanding terrain.

Yamaha Off Road Motorcycles - YZ85/LW

New wave-type discs, with rigid brake hoses

The YZ85’s new 220mm front and 190mm rear wave-type discs run cooler and give improved self-cleaning for strong stopping power. For improved feel and more precise control the YZ85 features new brake hoses with a lower expansion rate, and the front hose’s revised routing simplifies maintenance.

Yamaha Off Road Motorcycles - YZ85/LW

4-position adjustable tapered aluminium handlebars

Offering 27mm of potential movement, the YZ85’s 4-position adjustable handlebars make it easy to set the bike up to suit rider’s growth. Manufactured from aluminium, the tapered handlebars and cast upper triple clamp contribute towards the YZ85’s low weight of 73kg.

Yamaha Off Road Motorcycles - YZ85/LW

YZ450F-inspired aluminium swingarm design

For easier chain adjustment and quicker rear wheel removal, the YZ85 gets a newly designed lightweight aluminium swingarm that features chain adjusters inspired by the design used on the YZ450F. And to minimize unsprung weight there’s also a tough new composite chain guide.

Yamaha Off Road Motorcycles - YZ85/LW

Monocross rear suspension

Like the new front forks, the Monocross rear suspension is directly descended from the advanced technology used on our factory race bikes. The long aluminium swingarm activates the progressive link-type Monocross suspension to give 282mm rear wheel travel (LW model 287mm) that can handle everything from washboard sections through to hard landings.

Yamaha Off Road Motorcycles - YZ85/LW

Sharp and dynamic body design

When you look good you feel good – and with its sharp bodywork and factory-bike inspired graphics, the YZ85 is one of the most dynamic looking youth motocross bikes. With its increased engine and chassis performance as well as adjustable ergonomics, this high-tech 85 is the ultimate kids’ race bike.

Technical specifications


Engine type
Single cylinder, 2-stroke, liquid-cooled, reed valve
Bore x stroke
47.5 mm x 47.8 mm
Compression ratio
8.1 : 1
Maximum power
Maximum Torque
Lubrication system
Clutch Type
Wet, multiple-disc coil spring
Ignition system
Starter system
Transmission system
Constant Mesh, 6-speed
Final transmission
Keihin PWK28/1


Semi double cradle
Front travel
275 mm
Caster Angle
Front suspension system
Upside-down telescopic fork
Rear suspension system
Swingarm, (link suspension)
Rear Travel
287 mm
Front brake
Single Disc, Ø220 mm
Rear brake
Single Disc, Ø190 mm
Front tyre
70/100-19 42M
Rear tyre
90/100-16 52M


Overall length
1,903 mm
Overall width
758 mm
Overall height
1,156 mm
Seat height
904 mm
1,286 mm
Minimum ground clearance
393 mm
Wet weight (including full oil and fuel tank)
73 kg
Fuel tank capacity
5.0 litres
Oil tank capacity
0.5 litres


Yamaha Off Road Motorcycles YZ85/LW - Racing Blue

Racing Blue