Removing The Valves - Yamaha YZF-R1 1998 Service Manual

VALVES AND VALVE SPRINGS
EB403100

REMOVING THE VALVES

The following procedure applies to all of
the valves and related components.
1. Remove:
2. Check:
4 - 23
NOTE:
Before removing the internal parts of the
cylinder head (e.g.,
springs, valve seats), make sure that the
valves properly seal.
• valve lifter 1
• valve pad 2
NOTE:
Make a note of the position of each
valve lifter and valve pad so that they
can be reinstalled in their original place.
• valve
(for leakage)
Leakage at the valve seat → Check the
valve face, valve seat, and valve seat
width.
Refer to "CHECKING THE VALVE
SEATS".
a. Pour a clean solvent a into the intake
and exhaust ports.
b. Check that the valves properly seal.
NOTE:
There should be no leakage at the valve
seat 1.
ENG
valves, valve