| Bike | 1998 Honda XR400R |
| Standard Maintenance Interval | 1,000km (621.37mi) |
| Break-in Interval | 150km (93.21mi) |
| Engine Oil Change Interval | 1,000km (621.37mi) |
| Initial Valve Check | 150km (93.21mi) |
| Periodic Valve Check | 1,000km (621.37mi) |
| Engine Oil Capacity With Filter Change | 1.802L (0.476gal.) |
| More on Engine Oil | Honda GN4 or HP4 4-stroke oil or equivalent motor oil. API service classification: SF or SG Viscosity: 10W-40 or 20W-50. |
| Idle Speed RPM | 1,300 +/- 100 |
| Sparks | Standard Riding: NGK DPR8Z, DENSO X24GPR-U High Speed Riding: NGK DPR9Z, DENSO X27GPR-U |
| Spark Plug Gap | 0.6 – 0.7mm |
| Final Drive | Type: Chain 520 DID 520V8/108 or RK520M0Z6/108 Final Drive Ratio: 15 / 45 |
| Fork Oil | Level: 116mm (4.57″) Capacity: 559cc +/- 2.5cc |
| Front Wheel | 80/100-21 Dunlop K490G |
| Front Wheel Pressure (solo/dual riding) | 15psi (1.03bar, 103.42kPa) |
| Rear Wheel | 110/100-18 Dunlop K695 |
| Rear Wheel Pressure (solo/dual riding) | 15psi (1.03bar, 103.42kPa) |
| Headlight | Halogen /35W |
| Taillight | Halogen 5W |
| Valve Clearance | IN: 0.1mm +/- 0.05mm EX: 0.2mm +/- 0.05mm |
| Throttle Grip Free Play | 2 (0.08) – 6mm (0.24″) |
| Clutch Lever Free Play | 10 (0.39) – 20mm (0.79″) |
| Drive Chain Slack | 35 (1.38) – 45mm (1.77″) |
| Engine Oil Drain Bolt Torque | 25N·m (18.44ft·lbf) |
| Engine Oil Filter Torque | 12N·m (8.85ft·lbf) |