By model year
Yamaha YZ450F
2021 to 2027
7 model-year records side by side. A row is compared only where manual pages print the value; spec-sheet figures are shown but not judged.
On the manual pages
9 different17 the same4 printed differently1 not compared
Different on the manual pages
- Stock rear sprocket
- Stock final drive ratio
- Shock travel
- Stock shock spring rate
- Engine oil capacity (oil change)
- Engine oil capacity, with filter change
- Fork oil
- Wheelbase
- Weight (curb weight)
The records are for different markets (2021: US version; 2022: US version; 2023: US version; 2024: US version; 2025: not stated; 2026: US version; 2027: US version). Figures can differ between markets, not only between years.
"Not compared" means fewer than two records have the value from a manual page; it says nothing about whether the bike changed. "Printed differently" marks descriptions (the fork, the oil, pressures with printed conversions) that the manuals word differently; read both before assuming a change.
7 model years: the table scrolls sideways, and the spec names stay in view.
| Spec | Manual pages | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 | 2027 |
|---|---|---|---|---|---|---|---|---|
| Stock front sprocket | Same on the manuals | 13TOwner's manual p. 2-4 | 13TOwner's manual p. 2-4 | 13TOwner's manual p. 2-4 | 13TOwner's manual p. 2-4 | Not yet verified | 13TOwner's manual p. 2-4 | 13TOwner's manual p. 2-4 |
| Stock rear sprocket | Different on the manuals | 49TOwner's manual p. 2-4 | 49TOwner's manual p. 2-4 | 49TOwner's manual p. 2-4 | 49TOwner's manual p. 2-4 | Not yet verified | 51TOwner's manual p. 2-4 | 51TOwner's manual p. 2-4 |
| Chain pitch | Same on the manuals | 520Owner's manual p. 2-7 | 520Owner's manual p. 2-7 | 520Owner's manual p. 2-7 | 520Owner's manual p. 2-7 | Not yet verified | 520Owner's manual p. 2-7 | 520Owner's manual p. 2-7 |
| Stock chain links | Same on the manuals | 114Owner's manual p. 2-7 | 114Owner's manual p. 2-7 | 114Owner's manual p. 2-7 | 114Owner's manual p. 2-7 | Not yet verified | 114Owner's manual p. 2-7 | 114Owner's manual p. 2-7 |
| Stock final drive ratio | Different on the manuals | 3.769 : 1Owner's manual p. 2-4 | 3.769 : 1Owner's manual p. 2-4 | 3.769 : 1Owner's manual p. 2-4 | 3.769 : 1Owner's manual p. 2-4 | Not yet verified | 3.923 : 1Owner's manual p. 2-4 | 3.923 : 1Owner's manual p. 2-4 |
| Front rim | Same on the manuals | 21x1.6Owner's manual p. 2-5 | 21x1.6Owner's manual p. 2-5 | 21x1.6Owner's manual p. 2-5 | 21x1.6Owner's manual p. 2-5 | Not yet verified | 21x1.6Owner's manual p. 2-5 | 21x1.6Owner's manual p. 2-5 |
| Rear rim | Same on the manuals | 19x2.15Owner's manual p. 2-5 | 19x2.15Owner's manual p. 2-5 | 19x2.15Owner's manual p. 2-5 | 19x2.15Owner's manual p. 2-5 | Not yet verified | 19x2.15Owner's manual p. 2-5 | 19x2.15Owner's manual p. 2-5 |
| Front tire | Same on the manuals | 80/100-21 51MOwner's manual p. 2-5 | 80/100-21 51MOwner's manual p. 2-5 | 80/100-21 51MOwner's manual p. 2-5 | 80/100-21 51MOwner's manual p. 2-5 | 80/100-21Manufacturer spec sheet (research) | 80/100-21 51MOwner's manual p. 2-5 | 80/100-21 51MOwner's manual p. 2-5 |
| Rear tire | Same on the manuals | 120/80-19 63MOwner's manual p. 2-5 | 120/80-19 63MOwner's manual p. 2-5 | 120/80-19 63MOwner's manual p. 2-5 | 120/80-19 63MOwner's manual p. 2-5 | 120/80-19Manufacturer spec sheet (research) | 120/80-19 63MOwner's manual p. 2-5 | 120/80-19 63MOwner's manual p. 2-5 |
| Fork | Same on the manuals | Telescopic forkOwner's manual p. 2-6 | Telescopic forkOwner's manual p. 2-5 | Telescopic forkOwner's manual p. 2-5 | Telescopic forkOwner's manual p. 2-5 | KYB spring-type forkManufacturer spec sheet (research) | Telescopic forkOwner's manual p. 2-6 | Telescopic forkOwner's manual p. 2-6 |
| Fork travel | Same on the manuals | 310 mm (12.2 in)Owner's manual p. 2-6 | 310 mm (12.2 in)Owner's manual p. 2-6 | 310 mm (12.2 in)Owner's manual p. 2-6 | 310 mm (12.2 in)Owner's manual p. 2-6 | 310 mm (12.2 in)Manufacturer spec sheet (research) | 310 mm (12.2 in)Owner's manual p. 2-6 | 310 mm (12.2 in)Owner's manual p. 2-6 |
| Shock travel | Different on the manuals | Not yet verified | 317 mm (12.5 in)Owner's manual p. 2-6 | 315 mm (12.4 in)Owner's manual p. 2-6 | 315 mm (12.4 in)Owner's manual p. 2-6 | 315 mm (12.4 in)Manufacturer spec sheet (research) | 295 mm (11.6 in)Owner's manual p. 2-6 | 295 mm (11.6 in)Owner's manual p. 2-6 |
| Stock fork spring rate | Same on the manuals | Not yet verified | Not yet verified | 5 N/mmOwner's manual p. 10-3 | Not yet verified | Not yet verified | Not yet verified | 5 N/mmOwner's manual p. 10-3 |
| Stock shock spring rate | Different on the manuals | Not yet verified | Not yet verified | 58 N/mmOwner's manual p. 10-4 | Not yet verified | Not yet verified | Not yet verified | 56 N/mmOwner's manual p. 10-4 |
| Engine oil spec | Printed differently | SAE 10W-40, 10W-50, 15W-40, 20W-40 or 20W-50; API service SG type or higher, JASO standard MAOwner's manual p. 2-2 | SAE 10W-40, 10W-50, 15W-40, 20W-40 or 20W-50; API service SG type or higher, JASO standard MAOwner's manual p. 2-2 | SAE 10W-40 (or 10W-50, 15W-40, 20W-40, 20W-50), API SG or higher, JASO MAOwner's manual p. 2-2 | SAE 10W-40, 10W-50, 15W-40, 20W-40 or 20W-50; API service SG type or higher, JASO standard MAOwner's manual p. 2-2 | Not yet verified | SAE 10W-40, 10W-50, 15W-40, 20W-40 or 20W-50; API service SG type or higher, JASO standard MAOwner's manual p. 2-2 | SAE 10W-40 (or 10W-50, 15W-40, 20W-40, 20W-50), API SG or higher, JASO MAOwner's manual p. 2-2 |
| Engine oil capacity (oil change) | Different on the manuals | 630 ml (21.3 fl oz)Owner's manual p. 2-2 | 630 ml (21.3 fl oz)Owner's manual p. 2-2 | 940 ml (31.8 fl oz)Owner's manual p. 2-2 | 940 ml (31.8 fl oz)Owner's manual p. 2-2 | Not yet verified | 940 ml (31.8 fl oz)Owner's manual p. 2-2 | 940 ml (31.8 fl oz)Owner's manual p. 2-2 |
| Engine oil capacity, with filter change | Different on the manuals | 650 ml (22.0 fl oz)Owner's manual p. 2-2 | 650 ml (22.0 fl oz)Owner's manual p. 2-2 | Not yet verified | 960 ml (32.5 fl oz)Owner's manual p. 2-2 | Not yet verified | 960 ml (32.5 fl oz)Owner's manual p. 2-2 | 960 ml (32.5 fl oz)Owner's manual p. 2-2 |
| Coolant capacity | Same on the manuals | 1030 ml (34.8 fl oz)Owner's manual p. 2-2 | 1030 ml (34.8 fl oz)Owner's manual p. 2-2 | 1030 ml (34.8 fl oz)Owner's manual p. 2-2 | 1030 ml (34.8 fl oz)Owner's manual p. 2-2 | Not yet verified | 1030 ml (34.8 fl oz)Owner's manual p. 2-2 | 1030 ml (34.8 fl oz)Owner's manual p. 2-2 |
| Fuel capacity | Same on the manuals | 6.2 L (1.64 gal)Owner's manual p. 2-2 | 6.2 L (1.64 gal)Owner's manual p. 2-2 | 6.2 L (1.64 gal)Owner's manual p. 2-2 | 6.2 L (1.64 gal)Owner's manual p. 2-2 | 6.1 L (1.61 gal)Manufacturer spec sheet (research) | 6.2 L (1.64 gal)Owner's manual p. 2-2 | 6.2 L (1.64 gal)Owner's manual p. 2-2 |
| Fork oil | Different on the manuals | Yamaha Suspension Oil S1; Quantity (left) 501.0 cm³ (16.94 US oz, 17.67 Imp.oz); Quantity (right) 501.0 cm³ (16.94 US oz, 17.67 Imp.oz)Owner's manual p. 2-6 | Yamaha Suspension Oil S1; Quantity (left) 501.0 cm³ (16.94 US oz, 17.67 Imp.oz); Quantity (right) 501.0 cm³ (16.94 US oz, 17.67 Imp.oz)Owner's manual p. 2-6 | Not yet verified | Yamaha Suspension Oil S1; Quantity (left) 476.0 cm³ (16.09 US oz, 16.79 Imp.oz); Quantity (right) 476.0 cm³ (16.09 US oz, 16.79 Imp.oz)Owner's manual p. 2-6 | Not yet verified | Yamaha Suspension Oil S1; Quantity (left) 486.0 cm³ (16.43 US oz, 17.14 Imp.oz); Quantity (right) 486.0 cm³ (16.43 US oz, 17.14 Imp.oz)Owner's manual p. 2-6 | Yamaha Suspension Oil S1; Quantity (left) 501.0 cm³ (16.94 US oz, 17.67 Imp.oz); Quantity (right) 501.0 cm³ (16.94 US oz, 17.67 Imp.oz)Owner's manual p. 2-6 |
| Brake fluid | Same on the manuals | DOT 4Owner's manual p. 2-5 | DOT 4Owner's manual p. 2-5 | Not yet verified | DOT 4Owner's manual p. 2-5 | Not yet verified | DOT 4Owner's manual p. 2-5 | DOT 4Owner's manual p. 2-5 |
| Coolant type | Not comparedBlank in a record | Not yet verified | Not yet verified | Not yet verified | Not yet verified | Not yet verified | Not yet verified | High quality ethylene glycol antifreeze containing anti-corrosion for aluminum engineOwner's manual p. 3-23 |
| Fuel octane | Same on the manuals | Not yet verified | Octane number (RON) 95Owner's manual p. 2-2 | Not yet verified | Octane number (RON) 95Owner's manual p. 2-2 | Not yet verified | Octane number (RON) 95Owner's manual p. 2-2 | Octane number (RON) 95Owner's manual p. 2-2 |
| Idle speed | Same on the manuals | 1900–2100 r/minOwner's manual p. 2-4 | 1900–2100 r/minOwner's manual p. 2-4 | Not yet verified | 1900–2100 r/minOwner's manual p. 2-4 | Not yet verified | 1900–2100 r/minOwner's manual p. 2-4 | 1900–2100 r/minOwner's manual p. 2-4 |
| Valve clearance | Same on the manuals | Intake 0.10–0.17 mm (0.0039–0.0067 in); Exhaust 0.15–0.22 mm (0.0059–0.0087 in), coldOwner's manual p. 2-2 | Intake 0.10–0.17 mm (0.0039–0.0067 in); Exhaust 0.15–0.22 mm (0.0059–0.0087 in), coldOwner's manual p. 2-2 | Not yet verified | Intake 0.10–0.17 mm (0.0039–0.0067 in); Exhaust 0.15–0.22 mm (0.0059–0.0087 in), coldOwner's manual p. 2-2, 2-3 | Not yet verified | Intake 0.10–0.17 mm (0.0039–0.0067 in); Exhaust 0.15–0.22 mm (0.0059–0.0087 in), coldOwner's manual p. 2-2, 2-3 | Intake 0.10–0.17 mm (0.0039–0.0067 in); Exhaust 0.15–0.22 mm (0.0059–0.0087 in), coldOwner's manual p. 2-2, 2-3 |
| Tire pressure (off-road) | Printed differently | 100 kPa (1.00 kgf/cm², 15 psi) front and rear, measured on cold tiresOwner's manual p. 2-5 | 100 kPa (1.00 kgf/cm², 15 psi) front and rear, measured on cold tiresOwner's manual p. 2-5 | 100 kPa (15 psi) front and rearOwner's manual p. 2-5 | 100 kPa (1.00 kgf/cm², 15 psi) front and rear, measured on cold tiresOwner's manual p. 2-5 | Not yet verified | 100 kPa (1.00 kgf/cm², 15 psi) front and rear, measured on cold tiresOwner's manual p. 2-5 | 100 kPa (15 psi) front and rearOwner's manual p. 2-5 |
| Chain slack | Printed differently | 50.0–60.0 mm (1.97–2.36 in), on a maintenance standOwner's manual p. 2-7 | 50.0–60.0 mm (1.97–2.36 in), on a maintenance standOwner's manual p. 2-7 | 50.0-60.0 mm (1.97-2.36 in), on a maintenance standOwner's manual p. 2-7 | 50.0–60.0 mm (1.97–2.36 in), on a maintenance standOwner's manual p. 2-7 | Not yet verified | 50.0–60.0 mm (1.97–2.36 in), on a maintenance standOwner's manual p. 2-7 | 50.0-60.0 mm (1.97-2.36 in), on a maintenance standOwner's manual p. 2-7 |
| Spark plug and gap | Printed differently | NGK/LMAR8G, gap 0.7–0.8 mm (0.028–0.031 in)Owner's manual p. 2-2 | NGK/LMAR8G, gap 0.7–0.8 mm (0.028–0.031 in)Owner's manual p. 2-2 | NGK LMAR8G, gap 0.7-0.8 mmOwner's manual p. 2-2 | NGK/LMAR8G, gap 0.7–0.8 mm (0.028–0.031 in)Owner's manual p. 2-2 | Not yet verified | NGK/LMAR8G, gap 0.7–0.8 mm (0.028–0.031 in)Owner's manual p. 2-2 | NGK LMAR8G, gap 0.7-0.8 mmOwner's manual p. 2-2 |
| Seat height | Same on the manuals | 965 mm (38.0 in)Owner's manual p. 2-1 | 965 mm (38.0 in)Owner's manual p. 2-1 | 965 mm (38.0 in)Owner's manual p. 2-1 | 965 mm (38.0 in)Owner's manual p. 2-1 | 965 mm (38.0 in)Manufacturer spec sheet (research) | 965 mm (38.0 in)Owner's manual p. 2-1 | 965 mm (38.0 in)Owner's manual p. 2-1 |
| Wheelbase | Different on the manuals | 1485 mm (58.5 in)Owner's manual p. 2-1 | 1485 mm (58.5 in)Owner's manual p. 2-1 | 1480 mm (58.3 in)Owner's manual p. 2-1 | 1480 mm (58.3 in)Owner's manual p. 2-1 | 1481 mm (58.3 in)Manufacturer spec sheet (research) | 1475 mm (58.1 in)Owner's manual p. 2-1 | 1475 mm (58.1 in)Owner's manual p. 2-1 |
| Weight (curb weight) | Different on the manuals | 111 kg (245 lb)Owner's manual p. 2-1 | 111 kg (245 lb)Owner's manual p. 2-1 | 109 kg (240 lb)Owner's manual p. 2-1 | 109 kg (240 lb)Owner's manual p. 2-1 | 108.9 kg (240 lb)Manufacturer spec sheet (research) | 110 kg (243 lb)Owner's manual p. 2-1 | 109 kg (240 lb)Owner's manual p. 2-1 |