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[QUOTE="AMinkman, post: 323292, member: 16748"] Nikki, I think the only chart that is valid is the cr80 one. okkx'er, the yz80 and the yz85 are very different motors: ALL New for 2002! Engine: The industry’s mightiest mini gets an all-new lightweight, liquid-cooled two-stroke engine’s capacity increased from 83 to 85cc (bore x stroke = 47.5 x 47.8mm) to deliver even harder-hitting, moto-winning power throughout the RPM range. Crankcase features reshaped scavenging port for reduced horsepower loss and improved mid-range and top-end output. Crankcase reed valve induction and 28mm Keihin flat-slide carburetor ensures seamless throttle response across the powerband, while all-new, aluminum carb body helps reduce weight. New-design digital CD 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, 6-speed transmission features new-design main and drive axles, while all-new, heavy-duty, multi-plate clutch delivers maximum hook-up for outstanding acceleration and corner-exiting power. All-new, involute spline set-up in clutch means smoother shifting under power with greater durability at competition-level usage. All-new clutch cover features a sub-cover for easy access during maintenance. Gearbox features a new-design shift shaft for smoother shifting feel with no spring friction. All-new, lightweight radiator has larger cores and more louvers, while retooled water pump features a cast aluminum (vs. resin) impeller to ensure maximum cooling efficiency — and minimal horsepower loss. New, lightweight exhaust system design with a reshaped tapered section helps create a broader powerband with stronger low-end punch. New airbox design with reshaped filter ensures greater air cleaning performance and easier maintenance. Primary kickstarting features a reshaped lever with a sealed pivot to keep out water and mud, enhancing durability. [/QUOTE]
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MX, SX & Off-Road Discussions
Dirt Bike Mods & Maintenance
80cc Dyno Charts Here
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