Yamaha R15 2022 Service Manual page 70

TIP
Cylinder head bolt
Tighten the cylinder head bolts "1"–"6" in the proper tightening sequence as follows:
1. Lubricate the cylinder head bolts "1"–"4" threads and mating surface with molybdenum disulfide
grease.
2. Tighten the cylinder head bolts "1"–"4" to 12 N·m (1.2 kgf·m, 8.9 lb·ft).
3. Tighten the cylinder head bolts "1"–"4" to 24 N·m (2.4 kgf·m, 18 lb·ft).
4. After loosing each 4 bolt according to tightening order, and tightening bolts at process step 2 and 3
again (it is tighten after loosening all bolts).
5. Tighten the cylinder head bolts "5" and "6" to 10 N·m (1.0 kgf·m, 7.4 lb·ft).
TIGHTENING TORQUES
2-13
SPEC