Born from the award winning YZ competition bikes. The 2010 YZ85 features a liquid-cooled, 84.7cc crankcase reed-valve-inducted six-speed that is compact and light. You also get an ultra-rigid, single backbone, semi-double-cradle frame, fully adjustable suspension and more to suit a wide range of rider from novice to mini expert.

With the same chassis and engine technology that goes into every 2-stroke YZ, the scaled-down YZ85 is a true competitor.

The YZ85, with its ultra-rigid high-tensile steel frame and 36mm inverted forks, weighs just 55kg (126lbs.) Powered by a compact yet muscular liquid-cooled 85cc engine pumping the power through a six-speed gearbox, this bike’s engineered to catch some major air — and trophies, too. Fully adjustable suspensions, front and rear disc brakes and almost 11″ of wheel travel highlight “for competition use only.” Truly, this is full-sized performance in a scaled-down package.

Key Features

• Liquid-cooled, 84.7cc crankcase reed-valve-inducted six-speed is light, compact and designed to deliver hard-hitting, moto-winning power throughout the rpm range.

• Ultra-rigid, single-backbone, semi-double-cradle frame is lightweight and strong for sharp handling.

• Fully adjustable suspension allows a broad adjustment range to suit everybody from rank novice to mini expert.

Engine

• 84.7cc 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.

• Digital CDI ignition system puts out a more precise spark and monitors engine speed to ensure optimal timing for quicker, stronger response during hard acceleration.

• Smooth-shifting, six-speed close-ratio transmission with heavy-duty, multiplate clutch delivers maximum hookup for outstanding acceleration and corner-exiting power.

• Involute spline set-up in clutch means smoother shifting under power with great durability at competition-level usage.

• Two-piece clutch cover provides easy access during maintenance.

• Lightweight radiator has large cores and louvers, and the water pump features a cast aluminum (vs. resin) impeller for maximum cooling efficiency.

• Lightweight exhaust system design helps create a broader powerband with stronger low-end punch.

• Airbox design ensures greater air cleaning performance and easier maintenance.

Chassis/Suspension

• Rear subframe is removable to allow easy maintenance.

• 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.

• Rear suspension features fully adjustable Kayaba link-type shock with 11.1 inches of travel and race-tested compression damping valving.

• 220mm front disc and 190mm rear disc brakes with stainless steel rotors deliver strong, precise stopping power.

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

• Dunlop® knobbies provide great traction on a variety of tracks and terrain.

Additional Features

• Wide handlebar and flat fuel tank, radiator shrouds, side panels and rear fender provide rider with leverage and freedom of movement and weight transfer.

• Wide footpegs provide superb comfort, grip and ground clearance.

• Separate clutch cover with transmission oil filler opening makes for easy maintenance.

• Fuel tank cap is wider-diameter for easier usage, and large tank opening ensures fast, hassle-free refueling.

• Repackable exhaust silencer.

2010 Yamaha YZ85 – USA Specifications
MSRP* $3,690 (Team Yamaha Blue/White) Available from February 2010

Engine

Type: 84.7cc liquid-cooled 2-stroke; reed-valve inducted

Bore x Stroke: 47.5 x 47.8mm

Compression Ratio: 8.2:1

Fuel Delivery: Keihin® PWK 28

Ignition: CDI

Transmission: Constant-mesh 6-speed; multiplate wet clutch

Final Drive: Chain Drive

Chassis

Suspension/Front: Inverted fork; fully adjustable, 10.8-in travel

Suspension/Rear: Single shock; fully adjustable, 11.1-in travel

Brakes/Front: Hydraulic single disc brake, 220mm

Brakes/Rear: Hydraulic single disc brake, 190mm

Tires/Front: 70/100-17-40M

Tires/Rear: 90/100-14-49M

Dimensions

Length: 71.7 in

Width: 30.9 in

Height: 45.7 in

Seat Height: 34.0 in

Wheelbase: 49.5 in

Ground Clearance: 13.8 in

Fuel Capacity: 1.3 gal

Wet Weight: 156 lb

Warranty: 30 Day (Limited Factory Warranty)

For discussion on the Yamaha YZ85 or on Yamaha Motorcycles clink on link.

Yamaha YZ85 Specifications

• Yamaha YZ85 MSRP: $3,249 (Team Yamaha Blue/White)
• Yamaha YZ85 Engine:
• Type 85cc liquid-cooled 2-stroke; reed-valve inducted
  Bore x Stroke 47.5 x 47.8mm
  Compression Ratio 8.2:1
  Carburetion PWK28 x 1
  Ignition CDI
  Transmission Constant-mesh 6-speed; multiplate wet clutch
  Final Drive Chain Drive

• Yamaha YZ85 Chassis:
• Suspension/Front Inverted fork; fully adjustable, 10.8-in travel
  Suspension/Rear Single shock; fully adjustable, 11.1-in travel
  Brakes/Front Hydraulic single disc brake, 220mm
  Brakes/Rear Hydraulic single disc brake, 190mm
  Tires/Front 70/100-17-40M
  Tires/Rear 90/100-14-49M
• Yamaha YZ85 Dimensions:
• Length 71.7 in
  Width 30.9 in
  Height 45.7 in
  Seat Height 34 in
  Wheelbase 49.5 in
  Ground Clearance 13.8 in
  Dry Weight 146 lb
  Fuel Capacity 1.3 gal
• Yamaha YZ85 Other:
• Warranty: 30 Day (Limited Factory Warranty)

Yamaha YZ85 Specifications

• Yamaha YZ85 MSRP: $3,349 (Team Yamaha Blue/White) Available from August 2008
• Yamaha YZ85 Engine:
• Type 84.7cc liquid-cooled 2-stroke; reed-valve inducted
  Bore x Stroke 47.5 x 47.8mm
  Compression Ratio 8.2:1
  Carburetion Keihin® PWK 28
  Ignition CDI
  Transmission Constant-mesh 6-speed; multiplate wet clutch
  Final Drive Chain Drive

• Yamaha YZ85 Chassis:
• Suspension/Front Inverted fork; fully adjustable, 10.8-in travel
  Suspension/Rear Single shock; fully adjustable, 11.1-in travel
  Brakes/Front Hydraulic single disc brake, 220mm
  Brakes/Rear Hydraulic single disc brake, 190mm
  Tires/Front 70/100-17-40M
  Tires/Rear 90/100-14-49M
• Yamaha YZ85 Dimensions:
• Length 71.7 in
  Width 30.9 in
  Height 45.7 in
  Seat Height 34 in
  Wheelbase 49.5 in
  Ground Clearance 13.8 in
  Fuel Capacity 1.3 gal
  Wet Weight 156 lb
• Yamaha YZ85 Other:
• Warranty: 30 Day (Limited Factory Warranty)

Yamaha YZ85 Specifications

• Yamaha YZ85 MSRP: $3,249 (Team Yamaha Blue/White)
• Yamaha YZ85 Engine:
• Type 85cc liquid-cooled 2-stroke; reed-valve inducted
  Bore x Stroke 47.5 x 47.8mm
  Compression Ratio 8.2:1
  Carburetion PWK28 x 1
  Ignition CDI
  Transmission Constant-mesh 6-speed; multiplate wet clutch
  Final Drive Chain Drive

• Yamaha YZ85 Chassis:
• Suspension/Front Inverted fork; fully adjustable, 10.8-in travel
  Suspension/Rear Single shock; fully adjustable, 11.1-in travel
  Brakes/Front Hydraulic single disc brake, 220mm
  Brakes/Rear Hydraulic single disc brake, 190mm
  Tires/Front 70/100-17-40M
  Tires/Rear 90/100-14-49M
• Yamaha YZ85 Dimensions:
• Length 71.7 in
  Width 30.9 in
  Height 45.7 in
  Seat Height 34 in
  Wheelbase 49.5 in
  Ground Clearance 13.8 in
  Dry Weight 146 lb
  Fuel Capacity 1.3 gal
• Yamaha YZ85 Other:
• Warranty: 30 Day (Limited Factory Warranty)

Yamaha YZ85 Specifications

• Yamaha YZ85 MSRP: $3,099
• Yamaha YZ85 Engine:
• Type: 85cc, liquid-cooled, reed valve-inducted, 2-stroke
• Bore x Stroke: 47.5 x 47.8mm
• Compression Ratio: 8.2:1
• Carburetion: 28mm flat-slide Keihin PWK
• Ignition: Digital CDI
• Transmission: 6-speed w/multi-plate wet clutch
• Final Drive: #428 Chain

• Yamaha YZ85 Chassis:
• Suspension/Front: 36mm Kayaba inverted telescopic fork w/adjustable compression and rebound damping; 10.8″ travel
• Suspension/Rear: Kayaba single shock w/adjustable preload, compression and rebound damping; 11.3″ travel
• Brakes/Front: 220mm Disc
• Brakes/Rear: 190mm Disc
• Tires/Front: 70/100-17-40M Dunlop
• Tires/Rear: 90/100-14 -49MDunlop
• Yamaha YZ85 Dimensions:
• Length: 71.7″
• Width: 29.8″
• Height: 45.7″
• Seat Height: 34″
• Wheelbase: 49.5″
• Ground Clearance: 13.8″
• Dry Weight: 146 Lbs.
• Fuel Capacity: 1.3 Gallons
• Yamaha YZ85 Other:
• Warranty: 30 Day (Limited Factory Warranty)

Yamaha YZ85 Specifications

• Yamaha YZ85 MSRP: $3,099
• Yamaha YZ85 Engine:
• Type: 85cc, liquid-cooled, reed valve-inducted, 2-stroke
• Bore x Stroke: 47.5 x 47.8mm
• Compression Ratio: 8.2:1
• Carburetion: 28mm flat-slide Keihin PWK
• Ignition: Digital CDI
• Transmission: 6-speed w/multi-plate wet clutch
• Final Drive: #428 Chain

• Yamaha YZ85 Chassis:
• Suspension/Front: 36mm Kayaba inverted telescopic fork w/adjustable compression and rebound damping; 10.8″ travel
• Suspension/Rear: Kayaba single shock w/adjustable preload, compression and rebound damping; 11.3″ travel
• Brakes/Front: 220mm Disc
• Brakes/Rear: 190mm Disc
• Tires/Front: 70/100-17-40M Dunlop
• Tires/Rear: 90/100-14 -49MDunlop
• Yamaha YZ85 Dimensions:
• Length: 71.7″
• Width: 29.8″
• Height: 45.7″
• Seat Height: 34″
• Wheelbase: 49.5″
• Ground Clearance: 13.8″
• Dry Weight: 146 Lbs.
• Fuel Capacity: 1.3 Gallons
• Yamaha YZ85 Other:
• Main Jet: #138
• Main Air Jet: #60
• Jet Needle: NBKF-2
• Needle Jet: 2.6mm (I.D.)
• Pilot Air Jet 1: Not Applicable
• Pilot Outlet: 0.4
• Pilot Jet: #45
• Primary Reduction Ratio: 65/18 (3.611)
• Secondary Reduction Ratio: 47/14 (3.357)
• Gear Ratio – 1st Gear: 27/11 (2.454)
• Gear Ratio – 2nd Gear: 32/17 (1.882)
• Gear Ratio – 3rd Gear: 26/17 (1.529)
• Gear Ratio – 4th Gear: 22/17 (1.294)
• Gear Ratio – 5th Gear: 26/23 (1.130)
• Gear Ratio – 6th Gear: 25/25 (1.000)
• Color: Team Yamaha Blue/White
• Warranty: 30 Day (Limited Factory Warranty)