The Garage

By model year

Yamaha YZ450F
2023 vs 2025 vs 2027

3 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

5 different19 the same0 printed differently0 not compared

Different on the manual pages

The records are for different markets (2023: US version; 2025: not stated; 2027: Australia 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.

Yamaha YZ450F stock specs by model year, each value with its source, and whether the manual pages agree
SpecManual pages202320252027
Stock front sprocketSame on the manuals13TOwner's manual p. 2-4 Not yet verified13TOwner's manual p. 2-4
Stock rear sprocketDifferent on the manuals49TOwner's manual p. 2-4 Not yet verified51TOwner's manual p. 2-4
Chain pitchSame on the manuals520Owner's manual p. 2-7 Not yet verified520Owner's manual p. 2-8
Stock chain linksSame on the manuals114Owner's manual p. 2-7 Not yet verified114Owner's manual p. 2-8
Stock final drive ratioDifferent on the manuals3.769 : 1Owner's manual p. 2-4 Not yet verified3.923 : 1Owner's manual p. 2-4
Front rimSame on the manuals21x1.6Owner's manual p. 2-5 Not yet verified21x1.6Owner's manual p. 2-5
Rear rimSame on the manuals19x2.15Owner's manual p. 2-5 Not yet verified19x2.15Owner's manual p. 2-5
Front tireSame on the manuals80/100-21 51MOwner's manual p. 2-580/100-21Manufacturer spec sheet (research)80/100-21 51MOwner's manual p. 2-5
Rear tireSame on the manuals120/80-19 63MOwner's manual p. 2-5120/80-19Manufacturer spec sheet (research)120/80-19 63MOwner's manual p. 2-5
ForkSame on the manualsTelescopic forkOwner's manual p. 2-5KYB spring-type forkManufacturer spec sheet (research)Telescopic forkOwner's manual p. 2-6
Fork travelSame on the manuals310 mm (12.2 in)Owner's manual p. 2-6310 mm (12.2 in)Manufacturer spec sheet (research)310 mm (12.2 in)Owner's manual p. 2-6
Shock travelDifferent on the manuals315 mm (12.4 in)Owner's manual p. 2-6315 mm (12.4 in)Manufacturer spec sheet (research)295 mm (11.6 in)Owner's manual p. 2-7
Stock fork spring rateSame on the manuals5 N/mmOwner's manual p. 10-3 Not yet verified5 N/mmOwner's manual p. 10-3
Stock shock spring rateDifferent on the manuals58 N/mmOwner's manual p. 10-4 Not yet verified56 N/mmOwner's manual p. 10-4
Engine oil specSame on the manualsSAE 10W-40 (or 10W-50, 15W-40, 20W-40, 20W-50), API SG or higher, JASO MAOwner's manual p. 2-2 Not yet verifiedSAE 10W-40 (or 10W-50, 15W-40, 20W-40, 20W-50), API SG or higher, JASO MAOwner's manual p. 2-2
Engine oil capacitySame on the manuals940 ml (31.8 fl oz)Owner's manual p. 2-2 Not yet verified940 ml (31.8 fl oz)Owner's manual p. 2-2
Coolant capacitySame on the manuals1030 ml (34.8 fl oz)Owner's manual p. 2-2 Not yet verified1030 ml (34.8 fl oz)Owner's manual p. 2-2
Fuel capacitySame on the manuals6.2 L (1.64 gal)Owner's manual p. 2-26.1 L (1.61 gal)Manufacturer spec sheet (research)6.2 L (1.64 gal)Owner's manual p. 2-2
Tire pressure (off-road)Same on the manuals100 kPa (15 psi) front and rearOwner's manual p. 2-5 Not yet verified100 kPa (15 psi) front and rearOwner's manual p. 2-5
Chain slackSame on the manuals50.0-60.0 mm (1.97-2.36 in), on a maintenance standOwner's manual p. 2-7 Not yet verified50.0-60.0 mm (1.97-2.36 in), on a maintenance standOwner's manual p. 2-8
Spark plug and gapSame on the manualsNGK LMAR8G, gap 0.7-0.8 mmOwner's manual p. 2-2 Not yet verifiedNGK LMAR8G, gap 0.7-0.8 mmOwner's manual p. 2-2
Seat heightSame on the manuals965 mm (38.0 in)Owner's manual p. 2-1965 mm (38.0 in)Manufacturer spec sheet (research)965 mm (38.0 in)Owner's manual p. 2-1
WheelbaseDifferent on the manuals1480 mm (58.3 in)Owner's manual p. 2-11481 mm (58.3 in)Manufacturer spec sheet (research)1475 mm (58.1 in)Owner's manual p. 2-1
WeightSame on the manuals109 kg (240 lb)Owner's manual p. 2-1108.9 kg (240 lb)Manufacturer spec sheet (research)109 kg (240 lb)Owner's manual p. 2-1
Yamaha YZ450F 2023 specs Yamaha YZ450F 2025 specs Yamaha YZ450F 2027 specs