Yamaha YZ85 2011 2-stroke Motocross

When you’re serious about a future in motocross, the Yamaha YZ85 is the only one way to start out. YZ85. And when you check out the impressive specifications, it’s clear why this high-tech lightweight is the number one choice for future champions!

Yamaha YZ 85

Slim line body design and flat seat provide excellent freedom of movement for the rider. The seat features a “gripper” type seat.
Sealed tapered steering head bearings for durability.
Cleated rear brake pedal and folding shift lever tip provide superb grip and excellent durability.
Wide, cast-alloy footpegs are serrated to provide superb comfort, grip and ground clearance.
Wide-diameter fuel tank cap and large tank opening ensures fast, hassle-free refuelling.
Stainless steel inner clutch cable ensures longer life and smooth operation
Sealed pivot on kickstarter helps reduce wear.
Rubber boots on clutch and brake levers help reduce dirt, mud, and water entry for improved durability.
Convenient lifting holes in side cover.
Rugged chain guide helps prevent chain from de-railing and also protects the rear sprocket.
Heavy-duty rubber swingarm protector.
Stylish crossbar pad.
YZ85 large wheel kit (19″/17″) is available through Yamaha Genuine Parts & Accessories.

2011 yamaha yz85 disc brake front

Engine

Lightweight, compact, 84.7cc, liquid-cooled, crankcase reed-valve inducted,
2-stroke single.
Crankcase reed valve induction and 28mm Keihin flat-slide carburetor ensures seamless throttle response across the powerband. The aluminium carb body helps reduce weight.
Lightweight, forged piston means less reciprocal mass and less friction for a faster revving engine with great durability.
Digital CD ignition system provides a hot, precise spark and monitors engine speed to ensure optimal timing for quicker, stronger response during hard acceleration. This is a maintenance-free system.
Smooth-shifting, 6-speed transmission with involute splines on main and drive shafts are mated to a heavy-duty, multi-plate clutch delivering maximum hook-up for outstanding acceleration and corner-exiting power.
Clutch cover features a quick remove sub-cover for fast, easy access during maintenance.
Lightweight radiator with large size cores and computer-designed louvers provides maximum cooling efficiency.
Washable, dual-stage, foam filter ensures great air filtering performance and easy, economical maintenance.
Lightweight exhaust system is specially designed to create a broad powerband with strong low-end punch. The aluminium silencer is re-packable to maintain optimum performance and reduced noise levels.

yamaha yz85lw action

Chassis

Rigid, semi-double cradle steel frame is ultra-lightweight and incredibly strong providing minimal flex for razor-sharp moto-wining handling
Detachable rear subframe allows easy access for suspension maintenance
Lightweight box-section aluminium swingarm provides excellent rigidity for awesome rear wheel control and traction.
Lightweight, adjustable 36mm inverted Kayaba cartridge fork provides 275mm (10.8″) of wheel travel and adjusts for compression and rebound damping. Adjustments include: 20 clicks of both compression and rebound damping. Their construction offers YZ125/250 type valving and low-friction seals to ensure a smooth, compliant stroke for superior suspension performance and handling. Optional fork springs are available through Yamaha Genuine Parts and Accessories.
Monocross link rear suspension features a fully adjustable Kayaba piggyback shock providing 282mm (11.1″) of wheel travel. The piggyback design helps to keep the shock cool during a long moto to provide fade resistant damping and consistent performance. Adjustments include spring preload, 20 clicks of compression and 20 clicks of rebound damping. Optional shock springs are available through Yamaha Genuine Parts and Accessories.
220mm front disc with twin piston caliper and stainless steel rotor deliver strong stopping power with excellent control and great feedback. “Shorty style” adjustable brake lever can be tailored to fit various hand sizes.
190mm stainless steel rear disc brake is squeezed by a single piston caliper. The caliper is protected by a rugged plastic protector.
Lightweight 17″ front and 14″ rear DID rims provide exceptional durability and help reduce unsprung weight for optimal suspension performance.

Yamaha YZ85 2011 Technical data:

Engine

Engine
2-stroke, liquid-cooled,crankcase reed-valve,single

Displacement
85cc

Bore and Stroke
47.5 x 47.8mm

Compression Ratio
8.2:1

Fuel Delivery
Keihin PWK28

Ignition / Starting
CDI / Kick

Transmission
6-speed

Final Drive
Chain

CHASSIS

Suspension (Front)
Adjustable 36mm inverted fork / 275mm (10.8″) travel

Suspension (Rear)
Fully adjustable link Monocross / 282mm (11.1″) travel

Brakes (Front)
220mm disc

Brakes (Rear)
190mm disc

Tires (Front)
70/100-17

Tires (Rear)
90/100-14

CRITICAL DATA

Length
1,818mm (71.6″)

Width
758mm (29.8″)

Height
1,161mm (45.7″)

Wheelbase
1,255mm (49.4″)

Ground Clearance
351mm (13.8″)

Seat Height
864mm (34″)

Fuel Capacity
5 litres (1.1 imp. gallons)

Wet Weight
71kg (156.2 lb)

Colour(s)
Yamaha Blue

yamaha yz85lw blue

 

Source: Yamaha motor Canada, Yamaha motor UK

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