2003-2007 GAS GAS EC FSE 400/450 Service Manual

Technical Scope for the 2003–2007 GAS GAS EC FSE 400/450

• Covers 2003–2007 GAS GAS EC FSE 400 and EC FSE 450 competition-ready dirt bikes featuring the 4-stroke single-cylinder DOHC engine
• Original OEM publication dated December 2002, tailored for the production racer series
• Contains 21 detailed technical figures, component location diagrams, and an extensive torque specification table
• File is delivered as a direct download the moment payment clears
• Indexed PDF search covers every chapter and appendix
• Stored against your account so you can retrieve it after a hard-drive loss
• This official document provides the baseline service and maintenance criteria required for the Magneti Marelli injection system and long-stroke engine configuration

Engine and Chassis Documentation

The 2003–2007 GAS GAS EC FSE 400/450 service manual provides technical data and maintenance parameters for the high-performance liquid-cooled 4-cycle engine. This publication documents essential procedures for ignition system management, cooling system service, and how factory workshop documentation is structured. Detailed sections break down suspension tuning for front forks and rear shock absorbers, providing specific settings for rebound and compression dampening.

Specification Highlights

Reference values for maintenance include the 9 Nm (6 ft-lbs) torque specification for the water pump cover drain plug and the 27 Nm (20 ft-lbs) requirement for spark plug installation. Transmission oil capacity is listed at 1800 cc using 5W50 API SF or SG fluid. The engine displacement is explicitly documented at 399 cc or 449 cc depending on the model variant. Coolant system capacity for the EC FSE is documented at 1.1 liters. Steering stem head nut torque is specified at 44 Nm (4.5 kg-m). Reference only — always consult a certified technician before performing service on this equipment.

Document Reference: December 2002