Inspection / Servicing - Suzuki DF 25 Service Manual

INSPECTION / SERVICING

NOTE:
If cracks, excessive wear or other damage is found on any
com-ponent, replace component.
CYLINDER HEAD
Remove all carbon from combustion chambers.
NOTE:
• Do not use any sharp edged tool to scrape carbon off
cylin-der head or its components.
• Be careful not to scuff or nick metal surfaces when
decarboning.
Check cylinder head for cracks in intake and exhaust ports,
combustion chambers, and head surface.
Valve seat
Check valve seat, if cracks or other damage is found, replace
cylinder head.
Cylinder head distortion
Using a straightedge and thickness gauge, measure cylinder
head distortion (gasket surface) at a total of six (6) locations as
shown.
09900-20803 : Thickness gauge
Cylinder head distortion
Service limit : 0.05 mm (0.002 ft.)
If measurement exceeds service limit, resurface or replace cyl-
inder head.
NOTE:
Cylinder head can be resurfaced, using a surface plate and
#400 grit wet sandpaper.
Move the cylinder head in a figure eight pattern when sanding.
POWER UNIT 7-21