Yamaha YZ450FX 2019 Owner's Service Manual page 209

"2" or silencer "3". Be sure to insert the projection
"b" into the slot in the exhaust pipe (or silencer).
A
2 1
a
b
A. Exhaust pipe 1 and exhaust pipe 2
B. Exhaust pipe 2 and silencer
3. Install:
• Clamp
• Silencer "1"
• Bolt (silencer) "2"
Bolt (silencer)
30 N·m (3.0 kgf·m, 22 lb·ft)
1 1
4. Tighten:
• Bolt (exhaust pipe 2)
Bolt (exhaust pipe 2)
20 N·m (2.0 kgf·m, 15 lb·ft)
• Clamp
Clamp
12 N·m (1.2 kgf·m, 8.9 lb·ft)
TIP
Tighten while checking that their front and rear
joints are inserted in position.
B
3 1
a
b
2 2 2
5-10
ENGINE REMOVAL