2023 Yamaha YZ450F suspension sag & service guide
By the Garagely suspension teamUpdated 2026-07-28
For the 2023 Yamaha YZ450F (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 | 12.0 clicks | n/a |
| fork | rebound | 9.0 clicks | n/a |
| fork | spring | 5.0 N/mm | 4.1-5.1 N/mm |
| shock | compression hs | 1.25 turns | n/a |
| shock | compression ls | 11.0 clicks | n/a |
| shock | rebound | 12.0 clicks | n/a |
| shock | spring | 56.0 N/mm | 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 | n/a | 7.5 h | n/a |
| brake | n/a | 2.5 h | n/a |
| chain | n/a | 2.5 h | n/a |
| coolant | n/a | n/a | 730 d |
| fork | n/a | 12.5 h | n/a |
| fuelsys efi | n/a | 12.5 h | n/a |
| oil | n/a | 7.5 h | n/a |
| oilfilter | n/a | 7.5 h | n/a |
| spoke front | n/a | 2.5 h | n/a |
| spoke rear | n/a | 2.5 h | n/a |
| valve | 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
- Yamalube 10W-40 (or 10W-50/15W-40/20W-40/20W-50), API SG or higher, JASO MA
- Oil capacity
- 960 ml
- Coolant capacity
- 990 ml
- Tire sizes
- 80/100-21 (front)120/80-19 (rear)
- Stock fork spring
- 5.0
- Stock shock spring
- 56.0
- Fuel capacity
- 6.2 L
- Spark plug
- NGK LMAR8G
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
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