Honda Activa SCV110, Service Manual Digest

Page: 104 / 230

8-2
CYLINDER/PISTON
Y
CYLINDER REMOVAL
Remove the following:
— Cylinder head (page 7-5).
— Cam chain guide.
— Cam chain tensioner (page 7-5).
Check the cam chain guide and cam chain tensioner for
excessive wear or damage, replace them if necessary.
TOP
MIDDLE
BOTTOM
X
Lift the cylinder, and remove it, be careful not to
damage the piston with the stud bolts.
Remove the dowel pins and gasket.
Clean any gasket material off the mating surface of the
cylinder, be careful not to damage the mating surface.
INSPECTION
Inspect the cylinder bore for scratch or wear.
Measure the cylinder I.D. at three levels in an X and Y
axis.
Take the maximum reading to determine the cylinder wear.
SERVICE LIMIT: 50.10 mm (1.972 in)
Calculate the cylinder-to-piston clearance.
Refer to page 8-4 for measurement of the piston O.D.
SERVICE LIMIT: 0.10 mm (0.004 in)
Calculate the cylinder taper and out-of-round at three
levels in an X and Y axis. Take the maximum reading to
determine the taper and out-of-round.
SERVICE LIMITS: Taper: 0.05 mm (0.002 in)
Out-of-round: 0.05 mm (0.002 in)
The cylinder must be rebored and an oversize piston
fitted if the service limit is exceeded.
The cylinder must be rebored so that the clearance
between oversize piston and rebored cylinder should
be maintained between 0.010-0.040 mm
(0.0004-0016).
Be careful not to damage the sliding surface of the
piston and cylinder.
CYLINDER
GASKET
DOWEL PINS