2021 Suzuki DR-Z400S suspension sag & service guide
By the Garagely suspension teamUpdated 2026-07-28
For the 2021 Suzuki DR-Z400S (adventure / dual-sport), aim for fork rider (race) sag of 30-33% of travel and fork static sag of 10-15%. At the rear, target shock rider sag of 30-33% and shock static sag of 10-15%. These are percentage-of-travel starting points for the bike's discipline, not exact millimetre settings. Set sag first, then fine-tune the clickers from the stock baselines below, and re-check after any change.
Starting points, not exact settings. Sag targets and spring-rate estimates are reference values that vary by rider weight, model, and conditions. Verify against your owner's manual, dial them in to your own feel, and re-check after any change. Suspension affects handling and safety; consult a qualified suspension technician if unsure.
Specification and setup data below is provided in English from the shared knowledge base; numbers are not translated.
Suspension sag targets
Fork (front)
- Rider (race) sag
- 30-33%
- Static (free) sag
- 10-15%
Shock (rear)
- Rider (race) sag
- 30-33%
- Static (free) sag
- 10-15%
Source: Suspension tuning reference (sag-first method; Race-Tech-style spring estimate).
Adjuster baselines
| Component | Adjuster | Stock baseline | Range |
|---|---|---|---|
| fork | compression | n/a clicks | n/a |
| fork | rebound | n/a clicks | n/a |
| shock | compression ls | n/a clicks | n/a |
| shock | rebound | n/a clicks | n/a |
Starting points, not exact settings. Sag targets and spring-rate estimates are reference values that vary by rider weight, model, and conditions. Verify against your owner's manual, dial them in to your own feel, and re-check after any change. Suspension affects handling and safety; consult a qualified suspension technician if unsure.
Service intervals
| Service | Mileage | Hours | Time |
|---|---|---|---|
| air | 12000 km/mi | n/a | n/a |
| brake | n/a | n/a | 730 d |
| chain | 1000 km/mi | n/a | n/a |
| coolant | 48000 km/mi | n/a | 1460 d |
| fuelsys carb | 12000 km/mi | n/a | n/a |
| oil | 6000 km/mi | n/a | 365 d |
| oilfilter | 12000 km/mi | n/a | n/a |
| valve | 24000 km/mi | n/a | n/a |
Starting points, not exact settings. Sag targets and spring-rate estimates are reference values that vary by rider weight, model, and conditions. Verify against your owner's manual, dial them in to your own feel, and re-check after any change. Suspension affects handling and safety; consult a qualified suspension technician if unsure.
Key specifications
- Engine oil
- SAE 10W-40 JASO MA
- Oil capacity
- 1700 ml
- Coolant capacity
- 1300 ml
- Tire sizes
- 80/100-21120/90-18
- Stock fork spring
- 4.1
- Stock shock spring
- 52.0
- Fuel capacity
- 10.0 L
- Spark plug
- NGK CR8E
Starting points, not exact settings. Sag targets and spring-rate estimates are reference values that vary by rider weight, model, and conditions. Verify against your owner's manual, dial them in to your own feel, and re-check after any change. Suspension affects handling and safety; consult a qualified suspension technician if unsure.
Calculate your exact sag
Measure your bike, enter the numbers, and the free calculator checks your sag against this model's target band.
Open the sag calculatorTrack this setup in the app
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