Crankshaft - HYOSUNG MS3 250 Sercie Manual

3-29 ENGINE
▣ ▣ CONROD BIG END SIDE CLEARANCE
INSPECTION
Push the big end of the conrod to one side and mea-
sure the side clearance using a thickness gauge.
If the clearance exceeds the service limit, replace the
crankshaft assembly with a new one or bring the
deflection and the side clearance within the service
limit by replacing the worn parts (conrod, big end
bearing, crankshaft, crank pin, etc.) with new ones.
Standard
Conrod big
end side
0.10 ~ 0.45 mm
clearance
(0.004 ~ 0.018 in)
Thickness gauge : 09900-20806

CRANKSHAFT

▣ ▣ CRANKSHAFT RUNOUT INSPECTION
With the right and left crank journals supported using
a V-block, turn the crankshaft slowly. At this time,
measure the crankshaft end runout using a dial
gauge. If the runout exceeds the service limit,
replace the crankshaft with a new one.
Crankshaft runout
Crankshaft runout
Dial gauge : 09900-20606
Magnetic stand : 09900-20701
V-block : 09900-21304
Service limit
1.0 mm
(0.040 in)
Service limit
0.01 mm (0.0004 in)
Service limit
0.03 mm (0.0012 in)