2011 Yamaha YZ85 Review


Yamaha is one of the biggest names in motorcycles of all types and sizes and the 2011 Yamaha YZ85 is a great of example of why they are so great. The YZ85 is a great bike for all people but especially for those between the age of 9 and 14. The YZ85 has some scaled down body work for your typical YZ model. Yamaha used polypropylene for a lot of the materials such as side fenders, panes and fuel tank, which helped decrease weight and increase durability.

The 2011 Yamaha YZ85 has engine technology that makes it a top of the line piece of equipment. It uses a liquid-cooled, two-stroke 85cc engine that is factory tuned to deliver loads of performance and acceleration needed to win the race. The engine is also in perfect sync with the close-ratio six-speed transmission. It is a smooth shifting system that helps keep the bike sending power to the wheel and less time switching gears. The suspension is fully adjustable in the front and rear so as an eight year old grows in to the double digit ages, you can adjust the bike so it fits him or her as they grow older. The radiator is very lightweight with its large aluminum cores and louvers while the water pump uses a special cast aluminum impeller, maximizing the cooling capabilities of the radiator and water pump system. To aid in the bike’s performance capabilities, the YZ85’s engine comes with a specially-designed expansion chamber exhaust components to increase exiting air flow.

The lightweight suspension of the YZ85 is built with the same technology as Yamaha’s larger MXGP- winning models. The fully adjustable Kabaya 1.4 inch inverted fork with 10.8 inches of travel in the front and the fully adjustable Kabaya twin sided swing arm with 11.1 inches of travel in the rear deliver the kind of handling and precision steering that you see in the upper echelon of motor cross bikes.

When looking for the right dirt bike for your kid, the Yamaha YZ85 is the way to go. Its use of a cutting-edge engine combined with the suspension’s wide range of adjustment settings ensure that this bike is something that will last for years.

New For 2011

  • The lightweight and compact liquid-cooled, 85cc engine uses a reed-valve configuration for maximum horsepower and torque.
  • The crankcase reed valve induction system with the Keihin flat-side carburetor works together to give a seamless throttle response across the bike's whole range of rpms.
  • The six-speed transmission uses involute splines on main and drive shafts, which are mated to a heavy-duty, multi-plate clutch. This means for maximum connection friction for smooth shifting, superior acceleration and corner-exiting power.
  • Rigid, semi-double cradle steel frame is ultra-lightweight and incredibly strong providing minimal flex for crisp handling and lots of agility.
  • Lightweight, adjustable Kabaya suspension provides 10.8 and 11.1 inches of wheel travel and adjusts for compression and rebound damping.
  • Two-piston hydraulic caliper with 8.7 inch disc in the front and a single-piston hydraulic caliper with 7.5 inch disc deliver strong stopping power with excellent control. ""Shorty"" style levers can be installed for added comfort and customization

2011 Yamaha YZ85 Specs

  • Model: YZ 85
  • Engine Type: Liquid-cooled, two-stoke, single-cylinder 85cc
  • Bore and Stroke: 1.87 inches and 1.89 inches
  • Compression ratio: 8.2:1
  • Valve Train: Reed valve
  • Induction: Keihin carburetor
  • Ignition: Kick
  • Transmission: Six-speed manual
  • Final Drive: Chain
  • Fuel Capacity: 1.3 gallons
  • Estimated Fuel Economy: 71 miles per gallon (mpg)
  • Brakes (Front): Two-piston hydraulic caliper with 8.7 inch disc
  • Brakes (Rear): Single-piston hydraulic caliper with 7.5 inch disc
  • Suspension (Front): Kabaya 1.4 inch inverted fork with adjustable compression, rebound damping, and 10.8 inches of travel
  • Suspension (Rear): Kabaya twin sided swing arm with adjustable compression, a preloaded spring, adjustable rebound damping, one shock absorber and 11.1 inches of travel
  • Wheelbase: 49.5 inches
  • Rake: N/A
  • Trail: N/A
  • Seat Height: 34 inches
  • Curb Weight: 156 pounds (wet)
  • Tires (Front): Dunlop 70/100-17-40M
  • Tires (Rear): Dunlop 90/100-14-49M


  • The VForce 3i Performance Reed Valve System is newly designed, featuring a new intake boot with centralized openings that direct air straight into the engine block, new reed stops to increase petal stability, and a shorter reed cage for use of lighter petals to increase overall performance.
  • GYTR by FMF Racing Two-Stroke Exhaust Silencer includes an extruded aluminum canister, integrated mounts, formed stainless steel end caps and a mandrel bent stinger for increased performance and horsepower.
  • GTYR Billet Clutch Cover protects the high performance clutch components that are highly susceptible to dirt and grime.
  • LightSpeed Carbon Fiber MX glide Plate is durable and lightweight, protecting the engine for gliding over obstacles.
  • GYTR Panel Stand is made from lightweight and durable aluminum alloy that lets you stand your bike on it for maintenance, cleaning and showcasing.
  • ONE Industries/GYTR Flux Graphi Kit that features a durable vinyl material with 3M adhesive which provides protection for the tank and shroud areas above the engine, letting riders personalize their bike

Key Competitors For The 2011 Yamaha YZ85

  • Honda CRF150R
  • Kawasaki KX85
  • Suzuki RM85
  • TM MX 85
  • BETA EVO 80 Junior