1. General information
USE AND MAINTENANCE MANUAL
CHAPTER 1
GENERAL INFORMATION
4-Strokes - Edition 00 / 2022
31
1
Tip : Cylinder head bolt (XEF 250 version)
– Tighten all the cylinder head tightening bolts evenly in the tightening order to
30 Nm (3.0 kgf•m, 22 lb•ft)
.
– Remove the one bolt according to the tightening order. When doing so, do not remove the other bolts.
– Retighten the bolt to 15 Nm
(1.5 kgf•m, 11 lb•ft)
, and then tighten it further to reach the specified angle (60°).
– Remove the remaining bolts one by one in the same manner and retighten them.
– Finally, tighten all the bolts to reach the specified angle (60°).
Total tightening angle: 60° + 60° = 120°.
The first and second time, be sure to apply molybdenum disulfide oil to the bolt threads and seats as well as to both
sides of the lock washers.
3
2
4
1
FWD
Tip : Cylinder head bolt (XEF 450 version)
– First, tighten the cylinder head bolts to
40 N·m (4.0 kgf·m, 30 lb·ft)
in the proper tightening sequence and remove them.
– Retighten the cylinder head bolts to
23 N·m (2.3 kgf·m, 17 lb·ft)
in the proper tightening sequence.
– Tighten all bolts to reach the specified angle (90°) in a diagonal sequence.
– Then tighten the cylinder head bolts further to reach the specified angle (60°) in the proper tightening sequence.
The first and second time, be sure to apply molybdenum disulfide grease to the bolt threads and seats as well as to
both sides of the washers.
3
2
4
1
FWD