Yamaha YZ450FX 2019 Owner's Service Manual page 47

Piston ring
Top ring
End gap (installed)
End gap limit
Ring side clearance
Side clearance limit
2nd ring
End gap (installed)
End gap limit
Ring side clearance
Side clearance limit
Crankshaft
Crank assembly width
Runout limit
Clutch
Clutch type
Clutch lever free play
Friction plate 1 thickness
Wear limit
Plate quantity
Friction plate 2 thickness
Wear limit
Plate quantity
Clutch plate thickness
Plate quantity
Warpage limit
Clutch spring free length
Limit
Push rod bending limit
Drivetrain
Primary reduction ratio
Transmission type
Gear ratio
1st
2nd
3rd
4th
5th
Main axle runout limit
Drive axle runout limit
Secondary reduction ratio
Final drive
Air filter
Air filter element
Air filter oil grade
Fuel pump
Pump type
Maximum consumption amperage
ENGINE SPECIFICATIONS
0.20–0.30 mm (0.0079–0.0118 in)
0.55 mm (0.0217 in)
0.015–0.065 mm (0.0006–0.0026 in)
0.120 mm (0.0047 in)
0.35–0.50 mm (0.0138–0.0197 in)
0.85 mm (0.0335 in)
0.020–0.060 mm (0.0008–0.0024 in)
0.100 mm (0.0039 in)
61.93–62.00 mm (2.438–2.441 in)
0.030 mm (0.0012 in)
Wet, multiple-disc
7.0–12.0 mm (0.28–0.47 in)
2.92–3.08 mm (0.115–0.121 in)
2.82 mm (0.111 in)
6 pcs
2.92–3.08 mm (0.115–0.121 in)
2.82 mm (0.111 in)
2 pcs
1.50–1.70 mm (0.059–0.067 in)
7 pcs
0.10 mm (0.004 in)
48.00 mm (1.89 in)
45.60 mm (1.80 in)
0.10 mm (0.004 in)
2.609 (60/23)
Constant mesh 5-speed
2.416 (29/12)
1.733 (26/15)
1.312 (21/16)
1.050 (21/20)
0.840 (21/25)
0.08 mm (0.0032 in)
0.08 mm (0.0032 in)
3.846 (50/13)
Chain
Wet element
Yamaha foam air filter oil or other quality foam
air filter oil
Electrical
2.4 A
2-4