Triumph Rocket III Classic Service Manual page 99

8. Fit the valve collets ensuring their correct location in
the spring cap and valve as the spring compressor is
released.
' , ' ,
,iACaution
,
Always check for correct location of the valve collets
during and after assembly. If not fitted correctly, the
collets may become dislodged when the engine is
running allowing the valves to contact the pistons. Any
such valve to piston contact will cause severe engine
damage.
SelVice Manual - Rocket 1111 Classic 1 Touring
Cylinder Head
3.23