2017 Yamaha YZ85


The mini race bike of choice for future champions. High performance, two-stroke engine, six-speeds, top shelf suspension, light and nimble.

Additional Features

  • SMART RIDER ERGONOMICS: Wide handlebar and flat fuel tank, radiator shrouds, side panels and rear fender provide rider with leverage and freedom of movement and weight transfer.
  • GRIPPY FOOTPEGS: Wide foot pegs provide superb comfort and grip.
  • SIMPLIFIED SERVICING: Separate clutch cover with transmission oil filler opening makes for easy maintenance.
  • FUEL TANK DESIGN: Fuel tank cap is wider for easier usage, and large tank opening ensures fast, hassle-free refueling.

Chassis / Suspension

  • LIGHTWEIGHT SUBFRAME: Rear subframe is removable to allow easy maintenance.
  • FULL-ADJUSTABLE FORK: Lightweight 36mm KYB® inverted cartridge fork features 10.8 inches of travel with compression and rebound damping adjustability, and low-friction outer tubes and internals.
  • FULLY ADJUSTABLE SHOCK: Rear suspension features fully adjustable Kayaba® link-type shock with 11.1 inches of travel and race-tested compression damping valving.
  • HIGH PERFORMANCE BRAKES: 220mm front disc and 190mm rear disc brakes with stainless steel rotors deliver strong, precise stopping power.
  • LIGHTWEIGHT WHEELS: Lightweight 17-inch front and 14-inch rear rims are durable and reduce unsprung weight for optimal suspension performance.
  • RACE-READY TIRES: Dunlop® knobbies provide great traction on a variety of tracks and terrain.


  • COMPACT, POWERFUL TWO-STROKE: 85cc liquid-cooled, crankcase reed-valve-inducted, two-stroke engine inhales through a 28mm Keihin® flat-slide carburetor; seamless throttle response across the powerband is the result.
  • RELIABLE CLUTCH DESIGN: Involute spline set-up in clutch means smoother shifting under power with great durability at competition-level usage. A two-piece clutch cover provides easy access during maintenance.
  • HIGH CAPACITY RADIATOR: Lightweight radiator has large cores and louvers, and the water pump features a cast aluminum (vs. resin) impeller for maximum cooling efficiency.
  • RACE-TUNED EXHAUST: Lightweight exhaust system design helps create a broader powerband with stronger low-end punch.
  • HIGH-FLOW AIRBOX: Airbox design ensures greater air cleaning performance and easier maintenance.

Top Features

  • MODERN STYLING: Aggressive, modern styling includes the front fender, number plate, radiator shroud and side number plates.
  • ADJUSTABLE CONTROLS: Clutch lever reach adjuster to accommodate smaller hands for younger riders.
  • COMPACT TWO-STROKE POWERPLANT: Liquid-cooled, 85cc crankcase reed-valve-inducted six-speed is light, compact and designed to deliver hard-hitting, moto-winning power throughout the rpm range.
  • CLOSE-RATIO TRANSMISSION: Smooth-shifting, six-speed close-ratio transmission with heavy duty multiplate clutch delivers maximum hookup for outstanding acceleration and corner-exiting power.
  • STRONG, COMPACT FRAME: Ultra-rigid, single-backbone, semi-double-cradle frame is lightweight and strong for sharp handling.
  • RACE-READY SUSPENSION: Fully adjustable suspension allows a broad adjustment range to suit everybody from rank novice to mini expert.

General Information

Manufacturer Yamaha
Model Year 2017
Model YZ85
Model Code YZ85H
Color Team Yamaha Blue



Front - 220 mm hydraulic single disc

Rear - 190 mm hydraulic single disc


Front - 70/100-17 Dunlop®

Rear - 90/100-14 Dunlop®


Length 71.7 in.
Height 44.3 in.
Width 29.9 in.
Weight Wet - 157 lb.
Ground Clearance 13 in.
Wheelbase 49.5 in.
Seat Height 33.1 in.


Transmission Constant-mesh; 6-speed
Final Drive Chain


Engine Reed-valve inducted, 2-stroke
Displacement 85cc
Bore x Stroke 47.5 x 47.8 mm
Compression Ratio 8.1:1
Carburetion Keihin® PWK 28
Fuel Capacity 1.3 gal.
Ignition CDI
Clutch Multi-plate wet
Cooling Liquid



Front - Inverted fork; fully adjustable; 10.8 in. travel

Rear - Single shock; fully adjustable; 11.1 in. travel

Rake 26.2°
Trail 3.5 in.