Ym-4019/90890-04019; Valve Spring Compressor - Yamaha Tt-R125S Manuel D'atelier Du Proprietaire

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VALVES AND VALVE SPRINGS

REMOVAL POINTS

Valve sealing

Leakage at the valve seat → Inspect

the valve face, valve seat and valve

Checking steps:

Pour a clean solvent 1 into the intake and

exhaust ports.

Check that the valve seals properly.

There should be no leakage at the valve

Valve cotters 1

Attach a valve spring compressor 2 between

the valve spring retainer and the cylinder head

to remove the valve cotters.

YM-4019/90890-04019

Valve spring retainer 1

Valve spring 2

Valve stem seal 4

Valve spring seat 5

Identify the position of each part very carefully

so that it can be reinstalled in its original place.