This service manual supplement is specifically designed for the 2005 Yamaha RX-1, APEX, ATTAK, and MOUNTAIN snowmobile models. It contains 110 pages of detailed information that should be used in conjunction with the 2003 service manual (part number 12618-02-28). The supplement covers models including the RX-1, ER, MOUNTAIN, LIMITED EDITION, ER LIMITED EDITION, and RX WARRIOR LIMITED EDITION, with model numbers RX10K, RX10RK, RX10RSK, RXW10K, RXW10SK, RX10MK, and RX10MSK. This valuable resource provides comprehensive technical information and instructions for servicing and maintaining your 2005 Yamaha snowmobile, ensuring optimal performance and longevity.

The Yamaha RX-1, Apex, Attak, and Mountain snowmobiles were all introduced in 2003 with a revolutionary new engine design: the four-stroke, 998cc, 160-horsepower, fuel-injected, Genesis engine. This engine, coupled with Yamaha's advanced engineering, took the snowmobile industry by storm, offering unprecedented power, smooth operation, and fuel efficiency. The RX-1 was the flagship model, known for its sleek design, excellent handling, and effortless performance. The Apex, with its adjustable suspension, offered a more sport-oriented riding experience, while the Attak, with its aggressive styling and enhanced off-trail capabilities, was aimed at aggressive riders. The Mountain models, featuring specialized tracks and updated suspension for deep powder, were designed to conquer the backcountry. The 2005 model year saw several updates and refinements across the range. Yamaha further improved the Genesis engine's performance, resulting in more power and torque. The suspension systems were also enhanced with revised settings and components to further optimize handling and ride quality. The 2005 models also featured revised styling and graphics, giving them a more modern look. The RX-1 received aesthetic updates like a new headlight assembly and side panels. The Apex and Attak received new color schemes and graphics packages, further solidifying their sporty and aggressive personas. The Mountain models received specific tweaks to their suspension and track configurations, making them even more capable in deep snow conditions. These updates aimed to address any shortcomings from previous years while maintaining the overall appeal and performance of these revolutionary snowmobiles.