The 2005 650 V-Twin 4x4 FIS is a robust All-Terrain Vehicle (ATV) engineered for demanding off-road performance. Featuring a liquid-cooled, 650cc V-twin engine, this model delivers substantial power and torque, making it well-suited for utility tasks and challenging terrain. Its four-wheel-drive system, enhanced by FIS (Front Differential Lock), ensures superior traction and control in varied conditions, positioning it as a capable competitor in the mid-size to large displacement ATV segment of its era. The reputation for building durable and powerful machines is evident in the 650 V-Twin's design, offering a reliable platform for adventure and work. This comprehensive Parts Manual serves as an essential guide for owners and technicians of the 2005 650 V-Twin 4x4 FIS. Its primary purpose is to provide detailed factory parts identification and listing, supported by clear illustrations and exploded views of all major component groups. Coverage includes the engine, drivetrain, chassis, suspension, brakes, electrical systems, and bodywork. The manual facilitates accurate part ordering and ensures the correct components are used for maintenance, repair, and overhaul procedures, supporting the long-term upkeep and optimal performance of the vehicle.