This comprehensive factory service manual provides detailed instructions and guidance for maintaining, servicing, diagnosing, and repairing your Yamaha FX Nytro snowmobile, covering models FX10X, FX10RTX, FX10RTRX, FX10RTRAX, FX10MTX, FX10MTRX, and FX10MTRAX for the years 2007 to 2010. The manual is organized into nine chapters, starting with general information, covering snowmobile identification, important information, preparation for removal and disassembly, replacement parts, gaskets, oil seals, o-rings, lock washers/plates and cotter pins, bearings and oil seals, circlips, Loctite, and special tools for tune-up, engine service, powertrain service, fuel injection service, and electrical service. Chapter two focuses on periodic inspection and adjustment, covering general maintenance and lubrication charts, engine inspection, spark plugs, fuel line inspection, cooling system, valve clearance adjustment, throttle body synchronization, throttle cable free play adjustment, throttle override system (T.O.R.S.) check, compression pressure measurement, engine oil level inspection, engine oil replacement, cylinder head breather hose inspection, throttle body joints inspection, air filter element check, exhaust system inspection, powertrain inspection, sheave offset adjustment, drive v-belt, engagement speed check, parking brake pad inspection, parking brake adjustment, brake fluid level inspection, brake pad inspection, brake hose inspection, air bleeding (hydraulic brake system), drive chain, track tension adjustment, slide runner inspection, and maximizing drive track life. In chapter three, you will find detailed information on chassis, covering covers, steering, ski, front suspension, inspection, and installation of these components for all the specified models. Chapter four deals with powertrain, focusing on primary sheave and drive v-belt, secondary sheave, drive chain, secondary shaft, brake, brake pad, brake caliper and parking brake, brake master cylinder, slide rail suspension, front axle and track, covering inspection, disassembly, inspection, assembly, and installation of these components. Chapter five delves into the engine, covering seat and fuel tank, exhaust pipe and muffler, oil tank, engine assembly, camshafts, cylinder head, valves and valve springs, AC magneto rotor and starter clutch, oil pan and oil pump, crankcase, connecting rods and pistons, crankshaft and balancer shaft, going through the processes of removal, inspection, and installation for each component. Chapter six covers the cooling system, focusing on radiator, thermostat, water pump, oil cooler, and heat exchanger, covering inspection and installation. Chapter seven dives into the fuel injection system, covering circuit diagrams, ECU self-diagnostic function, troubleshooting chart, diagnostic mode, troubleshooting details, oil pressure switch, intake air temperature sensor, ISC (idle speed control) unit, air filter case, throttle body, and injectors, along with removal, inspection, and fuel pressure inspection. Chapter eight covers the electrical system, detailing switch inspection, ignition system, electrical starting system, charging system, lighting system, signal system, DC back buzzer, coolant temperature sensor, oil level switch, fuel sender, speed sensor, grip warmer system, and cooling system, covering circuit diagrams, troubleshooting, and other relevant procedures. The final chapter, chapter nine, covers general specifications, maintenance specifications for the engine, powertrain, chassis, and electrical system, tightening torque, general torque specifications, definition of units, and cable routing. This comprehensive manual empowers you with the knowledge and instructions to perform various maintenance and repair tasks on your Yamaha FX Nytro snowmobile, ensuring you can keep your machine running smoothly.

The Yamaha FX Nytro is a high-performance snowmobile renowned for its powerful engine and versatile handling, making it a popular choice for both recreational and competitive riders. Introduced in 2007, the FX Nytro series encompassed a range of models, each designed for specific riding styles and terrains. These models included the FX10X, a performance-focused model, the FX10RTX, a trail-oriented machine, the FX10RTRX, a more aggressive off-trail model, the FX10RTRAX, a backcountry-ready snowmobile, and the FX10MTX, FX10MTRX, and FX10MTRAX, which featured a longer track and improved suspension for more demanding conditions. The FX Nytro series featured Yamaha's powerful 1049cc, 4-stroke, 4-cylinder engine, delivering impressive power and torque throughout the rev range. The advanced fuel injection system ensured precise fuel delivery and optimal performance under various conditions. The FX Nytro models boasted a lightweight, yet robust chassis design, incorporating Yamaha's SR (Slide Rail) suspension system, providing exceptional handling and control. The SR system, coupled with the adjustable suspension components, enabled riders to fine-tune the snowmobile's performance for different terrains and preferences. The FX Nytro was equipped with a reliable and responsive braking system, providing confidence while navigating challenging conditions. The comprehensive safety features included a throttle override system (T.O.R.S) and a parking brake, ensuring rider security.