Honda VFR800F 2014 Service Manual page 260

CRAN KSHAFT/PISTON/CYLI
N
DER
SERVICE INFORMATION
GENERAL
'
The
crankcase must be
separated to
service the crankshaft
and
piston/connecting
rod.
Refer
to
procedures
for
crankcase
separation and assembly (page
12-1 1).
'
Mark and store the
connecting
rods,
bearing caps,
pistons,
and bearing
inserts
to be
sure
of
their correct
locations for
reassembly.
'
The crankpin
and main
journal bearing
inserts are select fit
and are identified by color codes.
Select
replacement bearings from
the code tables. After selecting new bearings,
recheck the oil
clearance
with
i
plastigauge. lncorrect oil clearance can
cause
major engine damage.
TROUBLESHOOTING
cylinder compression
is
too low,
hard
to start or poor performance
at
low
speed
.
Leaking cylinder head gasket
.
Worn, stuck, or broken piston ring
.
Worn or damaged cylinder
and piston
Cylinder compression too high, overheats or knocks
.
Excessive carbon built-up on piston head or combustion
chamber
Excessive
smoke
.
Worn cylinder, pislon,
or piston
ring
.
lmproper installation of piston rings
.
Scored or scratched piston or cylinder wall
Abnormal noise
.
Worn piston pin
or
piston pin hole
.
Worn connecting rod small end
.
Worn cylinder, piston, or piston rings
.
Worn
main
journal
bearings
.
Worn crankpin bearings
Engine vibration
.
Excessive crankshaft
runout
13-2