Cylinder Head Assembly - Sachs Bikes MadAss Reparaturanleitung

CYLINDER HEAD / VALVES
Install a 45 degree fi nish cutter and cut the seat to proper width.
Make sure that all pitting and irregularities are removed.
Refi nish if necessary.
STANDARD SEAT WIDTH: 1.0 mm
Apply a thin coating of Prussian Blue to the valve seat. Press
the valve through the valve guide and onto the seat to make a
clear pattern.
NOTE
The location of the valve seat in relation to the valve face is very
important for good sealing.
If the contact area is too high on the valve, the seat must be
lowered using a 32 degree fl at cutter.
If the contact area is too low on the valve, the seat must be
raised using a 60 degree inner cutter.
Refi nish the seat to specifi cations, using a 45 degree fi nish
cutter.
After cutting the seat, apply lapping compound to the valve
face, and lap the valve using light pressure.
After lapping, wash all residual compound off the cylinder head
and valves.

CYLINDER HEAD ASSEMBLY

Install new valve stem seals.
Lubricate each valve stem with the engine oil.
Insert the intake and exhaust valve into the valve guides.
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