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Key Features

Features Gallery
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    Slim new bodywork

    The new YZ85 is equipped with dynamic new slimline bodywork inspired by the YZ125. New uniform and narrow radiator shrouds improve the rider control and give a more aggressive and balanced look.

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    Flatter seat and redesigned fuel tank

    A flatter seat and redesigned fuel tank provide improved ergonomics for easy front/rear weight shifting. The new seat design accommodates a new single bolt seat fixing, making routine maintenance easier and quicker.

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    New lightweight aluminium rear frame

    An all-new detachable aluminium rear frame replaces the previous model’s steel unit and reduces weight by 570gr, contributing towards the bike’s mass centralisation.

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    New balanced rigidity aluminium swingarm

    The new YZ85 is equipped with a redesigned aluminium swingarm featuring a revised rigidity balance, that improves chassis stability and allows for enhanced traction.

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    85cc liquid cooled 2-stroke engine with YPVS

    The 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 high compression ratio – and equipped with a close ratio 6-speed transmission – the YZ85 delivers outstanding acceleration with race winning power.

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    Improved high-efficiency air intake system

    The air intake system has been redesigned and features new sidepanels with large rear facing vents for a straighter airflow into the engine’s airbox, which, increases the intake efficiency for improved engine performance.

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    Fully adjustable 36mm KYB® upside down front forks

    Featuring specially machined one-piece tapered outer tubes to align them well with the rigidity balance of the frame, and equipped with 36mm inner tubes, the inverted 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.

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    Link-type Monocross rear suspension

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

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    Wave discs and new rear brake system

    For powerful and controllable braking the YZ85 features self-cleaning wave type discs – with a 220mm front and 190mm rear. And for more linear rear braking and improved feel there’s a new rear master cylinder with a built-in sub-reservoir.

Technical Specifications

Download Factsheet
  • Engine
    Engine type
    Liquid-cooled, Single cylinder, Reed valve with YPVS, 2-stroke
    Bore x stroke
    47,5 x 47,8 mm
    Compression ratio
    8,2 - 9,6 : 1
    Lubrication system
    Clutch Type
    Wet, Multiple Disc
    Ignition system
    Starter system
    Transmission system
    Constant Mesh, 6-speed
    Final transmission
    Keihin PWK28/1
  • Chassis
    Semi double cradle
    Caster Angle
    26° 00′
    99 mm
    Front suspension system
    Telescopic fork
    Rear suspension system
    Swingarm, (Link type suspension)
    Front travel
    275 mm
    Rear Travel
    287 mm
    Front brake
    Hydraulic Single Disc, Ø220 mm
    Rear brake
    Hydraulic Single Disc, Ø190 mm
    Front tyre
    70/100-19 42M Tube type
    Rear tyre
    90/100-16 52M Tube type
  • Dimensions
    Overall length
    1.895 mm
    Overall width
    760 mm
    Overall height
    1.175 mm
    Seat height
    885 mm
    Wheel base
    1.285 mm
    Minimum ground clearance
    360 mm
    Wet weight (including full oil and fuel tank)
    75 kg
    Fuel tank capacity
    5,0 L
    Oil tank capacity
    0,5 L