Valve Seat Cutting - Linhai 2004 ATV 260 Service Manual

CHAPTER 3B ENGINE 50cc/80cc
ATV SERVICE MANUAL09.0

Valve seat cutting

Do not polish or cut excessively.
Cut primary surface with 45°cutting head.
Chamfer inner edge with 32°cutting head.
Chamfer outer edge with 60°cutting head.
Correct inner surface by 60°chamfered tool.
Trim valve seat to assigned width with
45°chamfered cutting tool.
Standard valve: 1.0mm
CHAPTER 3B ENGINE PAGE 3B - 14 -