Yamaha E115A Service Manual page 111

2. Check the cylinder head warpage using a
straightedge 1 and thickness gauge 2
in 4 directions as shown. Replace the
cylinder head if above specification.
1
Cylinder head warpage limit:
0.10 mm (0.0039 in)
61U5H11
2
61U50240
61U50250
Cylinder head
1
2
3
4
5
6
7
8
9
5-30