2023 Yamaha YZ85 Motocross Motorcycle

New 85cc YPVS Two-Stroke Power
The 85cc liquid-cooled, two-stroke engine now features the Yamaha Power Valve System for broad, tractable power across the rev range without losing peak power at high rpm.

Fully-Adjustable Fork
Lightweight 36mm KYB® inverted cartridge fork features 10.8 inches of travel with compression and rebound damping adjustability with low-friction outer tubes and internals.

Upgraded Wheels and Brakes
Lightweight 17-inch front and 14-inch rear rims are durable and reduce unsprung weight for optimal suspension performance, big 220mm and 190mm disc brakes for precise control, and new Dunlop® MX3S® knobbies for exceptional traction.

New Adjustable Rider Ergonomics
New four-position adjustable handlebar mounts and taper-style handlebars allows the rider to tune the handlebar position to suit their size and preferences.

All-New for 2019!
Redesigned from the ground up, the new YZ85 has been built to dominate the 85cc class with a new YPVS® power valve-equipped engine complete with revised intake, exhaust and transmission.

Upgraded Chassis
Featuring new front forks, a new swingarm, new wave-style brake rotors, adjustable ergonomics and more, the 2019 YZ85 is ready to win races straight off the dealership floor.

All-New YPVS Two-Stroke
The 85cc liquid-cooled, two-stroke engine now features the Yamaha Power Valve System for broad, tractable power across the rev range without losing peak power at high rpm—improving driveability and reducing the need for frequent shifting. A new head and longer connecting rod design work together to boost compression ratio for enhanced power output, too.

New Crankcase and Intake
A new crankcase design features a spacer-style reed valve intake for improved gas flow, which inhales through a 28mm Keihin® flat-slide carburetor for seamless throttle response.

New Expansion Chamber
Matched to the improved output of the YPVS engine, the new expansion chamber optimizes exhaust gas flow for enhanced power delivery, especially in the low- and mid-range.

Upgraded Transmission
Revised for 2019, the transmission increases the width of selected gears to provide enhanced gear engagement and smoother shifts.

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.

High-Flow Airbox
Airbox design ensures excellent air cleaning performance and easy maintenance.

Fully Adjustable Shock
Rear suspension features fully adjustable Kayaba® link-type shock with 11.1 inches of travel and race-tested compression valving. The progressive linkage-type design improves bottoming resistance, while updated settings improved bump absorption and bottoming resistance allowing racers to charge harder and improve lap times.

New Swing-arm Design
Redesigned swing-arm features a new composite chain guide as well as updated chain adjusters for easier maintenance.

Lightweight Subframe
Compact rear subframe is removable for simplified servicing.

Lightweight Wheels
Lightweight 17-inch front and 14-inch rear rims are durable and reduce unsprung weight for optimal suspension performance.

High Performance Tires
New for 2019 are Dunlop® MX3S® knobbies that provide exceptional traction on a variety of tracks and terrain.

Bore x Stroke

47.5mm x 47.8mm

Compression Ratio

8.2~9.6:1

Fuel Delivery

Keihin® PWK 28

Inverted fork; fully adjustable, 10.8-in travel

Suspension / Rear

Single shock; fully adjustable, 11.1-in travel

Brakes / Front

Hydraulic disc, 220mm

Brakes / Rear

Hydraulic disc, 190mm