The Mongoose 300, also known as the Maxxer 300, is an all-terrain vehicle (ATV) produced from 1999 to 2008. As a mid-size sport/utility ATV, it was designed to offer a balance of performance and value, competing with other 300cc class ATVs. A Taiwanese manufacturer with a history in scooters and motorcycles, positioned the Mongoose/Maxxer 300 series as a capable option for recreational riding and general utility tasks. This model features a 4-stroke, SOHC, liquid-cooled engine with a displacement of approximately 270-300cc, an automatic CVT transmission, and hydraulic disc brakes for reliable stopping power. This factory service repair manual provides comprehensive coverage for the Mongoose 300 and Maxxer 300 models. It details maintenance schedules and procedures, offers extensive diagnostic guides for troubleshooting, and includes all necessary technical data and specifications. The manual covers all major systems, including the engine, fuel system, ignition, cooling, transmission, brakes, suspension, steering, and electrical systems. It also provides step-by-step instructions for disassembly, reassembly, adjustments, lubrication, and special tool usage, enabling owners and independent repair shops to accurately diagnose and repair their vehicles.