Conrod And Crankshaft; Crankshaft Runout - Suzuki LT-Z250 Service Manual

3-38 ENGINE

CONROD AND CRANKSHAFT

CONROD SMALL END I.D.
Measure the conrod small end inside diameter with the small
bore gauge. If the conrod small end inside diameter exceeds the
service limit, replace the conrod with a new one.
% Conrod small end I.D.
Service Limit: 16.040 mm (0.6315 in)
& 09900-20605: Dial calipers (10 34 mm)
09900-22401: Small bore gauge (10 1 8 mm)
CONROD DEFLECTION
Wear of the conrod big end can be estimated by checking the
movement of the conrod small end. This method can also be
used to check the extent of wear on the parts of the conrod big
end.
% Conrod deflection
Service Limit: 3.0 mm (0.12 in)
& 09900-20701: Magnetic stand
09900-20607: Dial gauge (1/100 mm)
09900-21304: V-block
CONROD BIG END SIDE CLEARANCE
Slide the conrod big end to one side and measure the side clear-
ance with the thickness gauge. If the clearance exceeds the ser-
vice 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, crank
pin, etc.) with new ones.
% Conrod big end side clearance
Service Limit: 1.0 mm (0.04 in)
& 09900-20803: Thickness gauge

CRANKSHAFT RUNOUT

Support the crankshaft with the V-blocks and measure the
crankshaft runout with the dial gauge. If the runout exceeds the
service limit, correct or replace the crankshaft with a new one.
% Crankshaft runout
Service Limit: 0.08 mm (0.003 in)
& 09900-20607: Dial gauge (1/100 mm)
09900-20701: Magnetic stand
09910-21304: V-block set (100 mm)