This document pertains to the 2001 Monster 400, a model renowned for its distinctive naked sportbike styling and the performance characteristic of L-twin engines. As part of the iconic Monster family, this 398 cc air-cooled motorcycle, featuring a tubular steel trellis frame and a 5-speed manual transmission, was primarily produced for markets with engine displacement restrictions. Its engineering emphasizes a balance of sporty performance and accessible handling, making it a significant model within its segment.

This English-language parts catalog serves as an essential resource for owners, independent repair shops, and dealerships. It provides detailed breakdowns of all mechanical and electrical components, including engine parts like cylinders, pistons, and the crankshaft, as well as drivetrain components such as the gearbox and clutch. The manual includes high-resolution diagrams and part numbers crucial for accurate identification and ordering of genuine spare parts, ensuring proper maintenance and repair of the 2001 Monster 400.