2021 Yamaha YZ250 suspension sag & service guide
By the Garagely suspension teamUpdated 2026-07-28
For the 2021 Yamaha YZ250 (motocross), aim for fork rider (race) sag of 25-30% of travel and fork static sag of 10-16%. At the rear, target shock rider sag of 30-34% and shock static sag of 8-14%. 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
- 25-30%
- Static (free) sag
- 10-16%
Shock (rear)
- Rider (race) sag
- 30-34%
- Static (free) sag
- 8-14%
Source: Suspension tuning reference (sag-first method; Race-Tech-style spring estimate).
Adjuster baselines
| Component | Adjuster | Stock baseline | Range |
|---|---|---|---|
| fork | compression | 10.0 clicks | 1.0-20.0 clicks |
| fork | rebound | 10.0 clicks | 1.0-20.0 clicks |
| shock | compression hs | 1.5 turns | 0.0-3.0 turns |
| shock | compression ls | 10.0 clicks | 1.0-20.0 clicks |
| shock | rebound | 10.0 clicks | 1.0-20.0 clicks |
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 | n/a | 2.5 h | n/a |
| brake | n/a | n/a | 365 d |
| chain | n/a | 12.5 h | n/a |
| coolant | n/a | n/a | 730 d |
| fork | n/a | 7.5 h | n/a |
| fuelsys carb | n/a | 15.0 h | n/a |
| gearbox | n/a | 7.5 h | 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
- Transmission oil (Yamalube); premix 32:1 Yamalube 2-R
- Oil capacity
- 750 ml
- Coolant capacity
- 1150 ml
- Tire sizes
- 80/100-21110/90-19
- Stock fork spring
- 4.3
- Stock shock spring
- 50.0
- Fuel capacity
- 8.0 L
- Spark plug
- NGK BR9EG
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
Save your sag and clicker settings, get per-model targets, and log every change over time.
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