Removing The Valves; Checking The Valves And Valve Guides - Yamaha BT1100 2002 Service Manual

VALVE AND VALVE SPRINGS
EAS00237

REMOVING THE VALVES

The following procedure applies to all of the valves
and related components.
NOTE:
Before removing the internal parts of the cylinder
head (e.g., valves, valve springs, valve seats),
make sure that the valves properly seal.
1. Check:
• valve sealing
Leakage at the valve seat
face, valve seat, and valve seat width.
Refer to "CHECKING THE VALVE SEATS".
a. Pour a clean solvent 1 into the intake and
exhaust ports.
b. Check that the valves properly seal. There
should be no leakage at the valve seat 2.
2. Remove:
• valve cotters
NOTE:
Remove the valve cotters by compressing the
valve spring with the valve spring compressor 1.
Valve spring compressor
90890-04019
EAS00239

CHECKING THE VALVES AND VALVE GUIDES

The following procedure applies to all of the valve
and valve guides.
1. Measure:
• valve-stem-to-valve-guide clearance
Valve-stem-to-valve-guide clearance =
Valve guide inside diameter a –
Valve stem diameter b
4-22
ENG
Check the valve