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Description
Technical Specifications
- MFG. Part Number PWFWC-T07-500
Vehicle Information
Yamaha WR400F Dirt Bike (1998-2000)
The Yamaha WR400F, produced from 1998 to 2000, was a pioneering four-stroke enduro motorcycle renowned for its powerful engine and exceptional off-road capabilities. This model featured a single-cylinder, four-stroke, DOHC, 5-valve engine with a 399 cc displacement across all years. It was offered as a single "Enduro" or "Off-road" model, without distinct sub-trims. The WR400F saw significant evolution during its initial run. Introduced in 1998, it was derived from the YZ400F motocrosser. In 1999, it received updates to its suspension and engine calibration, alongside carburetor modifications for improved starting. The 2000 model year brought substantial changes, including a slimmer seat and fuel tank (reducing capacity to 8 liters), making the bike 2.5 kg lighter. Other enhancements included faster suspension damping, a stiffer lower triple-clamp, and a repositioned steering head to shorten the wheelbase, alongside further chassis, ignition, and engine refinements. FAQ:
Q: How do I ensure this product fits my Yamaha WR400F?
A: To guarantee compatibility, please use the year and edition selector at the top of this page to specify your exact model year.
Maintenance
| Component | Interval | Details |
| Engine Oil Changes | 1998: 5 h (aggressive riding) or 10 h (recreational); 1999-2000: 10 h (aggressive riding) or 15 h (recreational) | |
| Oil Filter | Every oil change (2000 model); or every 6,000 km (general Yamaha recommendation) | |
| Air Filter Service | 5 h (aggressive riding) or 10 h (recreational) | Regular inspection, cleaning, and re-oiling are crucial, especially after riding in dusty conditions. |
| Spark Plug | Inspection at 100 h or 1 year | |
| Coolant | Leakage inspection at 20 h (or 3 months) and 100 h (or 1 year) | No specific replacement interval provided. |
| Valve Inspections | 1998: 10 h (aggressive riding) or 20 h (recreational); 1999: 20 h (all styles); 2000: 20 h (aggressive riding) or 30 h (recreational) |