What is the usual cost of replacing valve seats? I have a KZ1300 head which I would like to put ZN1300 valves. They are 1.5mm larger. Or can valve seats be bored out to accept the larger valves. This would mean boring out .030 out of the seat wall. Is that ever done?
74 Z1-A stock
76 KZ-900 Totaly stock vice MAC pipe
77 KZ-1000A stock
78 Z1-R 100%MINT 500 original Mi.
78 Z1-R Yoshi 1103 kit stage 1 cams Yoshi pipe. Etc
79 KZ-1300 (1400)
80 KZ-1300
81 Scratch built GPz1150R
82 KZ1000
