Yamaha YZ 2018 Series Owner's Service Manual page 267

CRANKCASE
1
LT
2
5
3
4
2
6
a b
6 4
6
5
6
4
4
4
4. 45 mm (1.77 in)
5. 60 mm (2.36 in)
6. 75 mm (2.95 in)
a. Hexagon socket head bolt without flange
b. Hexagon socket head bolt with flange
5-70