Harley-Davidson Sportster S 2021 Maintenance Schedule
The 2021 Harley-Davidson Sportster S maintenance schedule below covers the manufacturer's recommended service intervals for drive chain maintenance, general maintenance, air filter, tires, brake fluid, battery, oil and spark plugs. Intervals are shown in kilometres by default and can be switched to miles.
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Sourced from maintenanceschedule.com Harley-Davidson Sportster S (RH1250S) Maintenance Schedule (Maintenance Chart Summary (third-party, citing official manual)) (this document covers model years 2021–2024): maintenanceschedule.com
Full schedule
| Task | Interval | Difficulty | Notes |
|---|---|---|---|
| Inspect drive belt and sprockets | Every 8,000 km · Every 12 months | Easy | Inspect final drive belt condition and front/rear sprocket wear. |
| Inspect fuel lines and fittings | Every 8,000 km · Every 12 months | Easy | Inspect fuel lines and fittings for leaks or abrasion. |
| Inspect oil and brake lines | Every 8,000 km · Every 12 months | Easy | Inspect oil lines and brake lines for leaks or abrasion. |
| Inspect air cleaner filter | Every 8,000 km · Every 12 months | Easy | Inspect the air cleaner filter element; clean or replace as needed. |
| Inspect electrical equipment and switches | Every 8,000 km · Every 12 months | Easy | Inspect electrical equipment and switches for correct operation. |
| Check tire pressure and tread | Every 8,000 km · Every 12 months | Easy | Check front and rear tire pressure (cold) and tread depth. |
| Adjust primary chain | Every 8,000 km · Every 12 months | Moderate | Check and adjust primary chain slack. |
| Inspect front brake fluid level | Every 8,000 km · Every 12 months | Easy | Check front brake fluid reservoir level. |
| Inspect rear brake fluid level | Every 8,000 km · Every 12 months | Easy | Check rear brake fluid reservoir level. |
| Check brake fluid moisture content | Every 8,000 km · Every 12 months | Easy | Check brake fluid moisture content; replace if it exceeds 3%. |
| Inspect front brake pads and discs | Every 8,000 km · Every 12 months | Easy | Inspect front brake pads and discs for wear. |
| Inspect rear brake pads and discs | Every 8,000 km · Every 12 months | Easy | Inspect rear brake pads and discs for wear. |
| Lubricate throttle, brake, and clutch controls | Every 8,000 km · Every 12 months | Easy | Lubricate throttle, brake lever, and clutch lever controls. |
| Adjust clutch | Every 8,000 km · Every 12 months | Easy | Check and adjust clutch cable free play. |
| Check 12-volt battery and terminals | Every 8,000 km · Every 12 months | Easy | Check battery charge, terminal torque, and connection cleanliness. |
| Lubricate jiffy stand | Every 8,000 km · Every 12 months | Easy | Lubricate the side stand pivot point. |
| Inspect exhaust system | Every 8,000 km · Every 12 months | Easy | Inspect exhaust system for leaks and fastener tightness. |
| Road test | Every 8,000 km · Every 12 months | Easy | Road test the motorcycle to confirm correct function of all systems. |
| Replace engine oil | Every 8,000 km · Every 12 months | Easy–Moderate | Drain and replace engine oil. Drain plug torque 15 lb-ft / 20 Nm. |
| Replace oil filter | Every 8,000 km · Every 12 months | Easy | Replace the oil filter; hand-tighten 3/4 turn after gasket contact. |
| Check/tighten spoked rim spokes | Every 8,000 km | Moderate | Check and tighten spoked wheel rim spokes as necessary. |
| Replace spark plugs | Every 16,000 km | Moderate | Replace spark plugs. |
| Replace transmission lubricant | Every 16,000 km · Every 24 months | Moderate | Drain and replace transmission lubricant. |
| Adjust steering head bearings | Every 16,000 km | Advanced | Check steering head bearing play and adjust as needed. |
| Torque hand control switch housing screw | Every 16,000 km · Every 12 months | Easy | Check and torque the hand control switch housing screw to spec. |
| Torque front stabilizer link and isolator mounts | Every 16,000 km · Every 12 months | Moderate | Check and torque the front engine stabilizer link and isolator mounting hardware. |
| Torque front and rear axle nuts | Every 16,000 km · Every 12 months | Easy–Moderate | Check and torque front and rear axle nuts to spec. |
| Torque brake banjo bolts | Every 16,000 km · Every 12 months | Easy–Moderate | Check and torque front and rear brake caliper banjo bolts to spec. |
| Lubricate steering head bearings | Every 32,000 km | Advanced | Disassemble and repack steering head bearings with grease. |
| Replace brake fluid | Every 24 months | Moderate | Drain and replace front and rear brake fluid with fresh DOT 4 fluid (e.g. Castrol DOT 4). |
| Rebuild front forks | Every 64,000 km | Expert | Disassemble, inspect, rebuild, and replace fork oil in the front forks (inverted forks). |
| Replace fuel filter | Every 160,000 km | Moderate | Replace the in-tank fuel filter. |
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Easy: basic tools, straightforward Easy–Moderate: varies by task — somewhere between the two Moderate: some mechanical know-how helps Advanced: specialized tools/skill, still DIY-doable Expert: significant experience required Professional: dealer or shop recommended
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