This manual covers the Yamaha SRX snowmobile models from 1998 and 1999, including the SRX600B, SRX700B, and SRX700PB Mountain SRX. These performance-oriented, trail-focused snowmobiles were known for their powerful twin-cylinder, liquid-cooled 2-stroke engines, delivering approximately 105-110 HP for the 600cc models and 120-130 HP for the 700cc variants. Featuring Yamaha's reliable engineering, the SRX series offered agile handling and aggressive styling, competing in the premium performance snowmobile market of its era. This comprehensive factory service manual provides in-depth technical information for owners, mechanics, and technicians. It details engine mechanical procedures, fuel and ignition systems, electrical diagnostics, drivetrain maintenance, suspension and steering adjustments, braking systems, and chassis repairs. The manual includes routine maintenance schedules, troubleshooting guides, diagnostic flowcharts, detailed specifications, and complete disassembly and reassembly instructions, ensuring the optimal performance and longevity of your Yamaha SRX snowmobile.