1987-2003 Yamaha YFZ350 Banshee supplementary service manual, Page 120Get this manual
INSPECTION AND REPAIR INSPECTION AND REPAIR
CYLINDER HEAD 1Remove: Carbon deposits Use scraper (DNOTE: Take care avoid damaging the spark plug threadsDo not use sharp instrumentAvoid scratching the aluminum
2Inspect:
Cylinder head water jacket crust of minerals Rust+ RemoveCylinder head warpage out of specification