This comprehensive service manual provides detailed instructions and specifications for servicing and repairing Polaris Youth 120 snowmobiles from model years 2000 to 2008. The manual covers a wide range of topics, including general information and specifications, engine maintenance, fuel systems, electrical systems, drive train, track and brake systems, rear suspension, steering, and body components. The manual is organized into logical sections, each with detailed illustrations, diagrams, exploded parts views, and step-by-step instructions. Troubleshooting sections are included for each system, providing guidance on diagnosing and resolving common problems. Key sections include: **General Information & Specifications:** Provides essential information on snowmobile identification, recommended fuels and lubricants, break-in procedures, genuine parts, high altitude operation, drive chain lubrication, low oil pressure warning light, preparation for storage, and post-storage preparation. **Engine:** Explains troubleshooting procedures for both carbureted and EFI engines, covers essential maintenance tasks such as changing oil, oil filter, spark plugs, servicing valves, and testing oil pressure. **Engine-Related Items:** Includes instructions on servicing the water pump, pressure testing the engine, removing and installing spark plugs, checking compression, servicing valves, changing oil and oil filter, testing oil pressure, servicing the liquid cooling system, recoil starter, air silencer, turbocharger and intercooler (if applicable), power valve (APV) system, and exhaust controlled timing (ECT) system. **Fuel Systems:** Provides detailed information on carbureted and EFI fuel systems, including troubleshooting procedures. **Electrical Systems:** Covers ignition system, throttle position sensor, testing main wiring harness, voltage regulator test, low-oil light sensor, coolant temperature warning light, fuel gauge sender, electric fuel pump, ignition components, emergency stop switch fuse, ignition switch, starter motor, magneto, electric start troubleshooting, ignition timing, brake light switch, headlight dimmer switch, speedometer sensor, accessories, and servomotor troubleshooting. **Drive Train/Track/Brake Systems:** Includes instructions on servicing the drive chain and sprockets, drive chain, track, and driveshaft, brake system, drive belt, drive clutch, driven pulley, drive train/brake disc, drive sprockets, track tension, track alignment, hydraulic brake system, troubleshooting the track, hydraulic brake system, drive clutch/driven pulley, and drive belt. **Rear Suspension:** Explains the operation of the rear suspension, suspension setup basics, chassis and skid frame mounting locations, servicing the rear suspension, ACT shock, rebuilding and recharging air shocks, and pressurizing rebuildable shocks. **Steering and Body:** Covers steering post, ski wear bar, tie rods/steering link, spindle, steering tie rod, ski alignment, front suspension arms, front suspension shock absorber, sway bar, front suspension mounting bracket, console, front bumper/belly pan assembly, gas tank/seat assembly, seat cushion, taillight/brake light assembly, windshield, backrest/rack assembly, tunnel/chassis/rear bumper, snow flap, headlight assembly, and adjusting headlight aim.

The Polaris 120 Snowmobile, produced from 2000 to 2008, was designed as a youth-oriented snowmobile, offering a safe and engaging introduction to the world of snowmobiling for young riders. This lightweight and maneuverable machine featured a single-cylinder, two-stroke engine with a displacement of 119cc, providing a manageable power output for young riders. The 120 was known for its reliable and robust construction, making it a popular choice for families looking to introduce their children to the thrill of snowmobile riding. The 2000-2008 Polaris 120 was a simple yet effective snowmobile, featuring a basic suspension setup with a single front ski and a rear suspension system designed for comfort and stability. The 120's user-friendly controls and forgiving nature made it ideal for young riders learning the fundamentals of snowmobile operation. The model's compact size and lightweight construction also contributed to its ease of handling, allowing young riders to maneuver it with confidence. With a comfortable seat and a design that prioritized safety, the Polaris 120 instilled a sense of adventure while ensuring a secure and controlled riding experience for young enthusiasts.