Daelim B-Bone 125cc service manual.pdf - Mojo

CYLINDER HEAD / VALVES
VALVE GUIDE
● Apply oil to a new O-ring and install it onto a new
valve guide.
● Drive the new guide in from the camshaft side of the
cylinder head while the cylinder head is still heated.
TOOL : VALVE GUIDE DRIVER
● When reaming new valve guides, insert the valve guide
reamer from the combustion chamber side.
△! NOTE
●Take care not to tilt or lean the reamer in the guide
while reaming.
●Otherwise, the valve is installed slanted, that causes oil
leaks from the stem seal and improper valve seat
contact and results in the valve seat refacing not able
to be performed.
●Use cutting oil on the reamer during this operation.
●Rotate the reamer clockwise, never counterclockwise
when inserting and removing.
TOOL : VALVE GUIDE DRIVER
● Reface the valve seats and clean the cylinder head
thoroughly to remove any metal particles.
VALVE SEATS
INSPECTION
● Clean all intake and exhaust valves thoroughly to
remove carbon deposits.
● Apply a light coating of Prussian Blue to each valve
face.
VALVE
10-8