2023 Suzuki RM-Z450 suspension sag & service guide
By the Garagely suspension teamUpdated 2026-07-28
For the 2023 Suzuki RM-Z450 (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 | 9.0 clicks | n/a |
| fork | rebound | 11.0 clicks | n/a |
| fork | spring | 5.0 N/mm | 4.8-5.2 N/mm |
| shock | compression | 2.0 turns | n/a |
| shock | preload | 110.0 mm | n/a |
| shock | rebound | 1.0 turns | n/a |
| shock | spring | 56.0 N/mm | 52.0-56.0 N/mm |
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 | 2.0 h | n/a |
| brake | n/a | n/a | 365 d |
| coolant | n/a | n/a | 365 d |
| fork | n/a | 6.0 h | n/a |
| valve | n/a | 12.0 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
- SAE 10W-40, API SJ/SL/SM/SN, JASO MA (MA1 or MA2). Suzuki recommends ECSTAR R9000 10W-40 MA, ECSTAR R7000 10W-40 MA, or equivalent. Energy Conserving / Resource Conserving grades are NOT recommended.
- Oil capacity
- 1100 ml
- Coolant capacity
- 1100 ml
- Tire sizes
- 80/100-21 51M tube type (front)110/90-19 62M tube type (rear)
- Stock fork spring
- 5.0
- Stock shock spring
- 56.0
- Fuel capacity
- 6.3 L
- Spark plug
- NGK DIMR8C10
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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