Suzuki DF 2.5 Service Manual page 93

Conrod big end side clearance
Measure the clearance with the conrod installed on the crank pin
as shown in the figure.
 09900-20803: Thickness gauge
Conrod big end side clearance:
Standard: 0.20 – 0.70 mm (0.008 – 0.028 in)
Service limit: 1.00 mm (0.039 in)
If the measurement exceeds the service limit, replace the con-
rod assembly and/or crankshaft.
Conrod big end width:
Standard: 17.50 – 17.80 mm (0.689 – 0.701 in)
Crank pin width:
Standard: 18.00 – 18.20 mm (0.709 – 0.717 in)
Crank pin
Inspect the crank pin for uneven wear or damage. Measure the
crank pin outside diameter for out-of-round or taper using the
micrometer.
Out-of-round: A – B
Taper: a – b
 09900-20205: Micrometer
Crank pin outside diameter difference
(Out-of-round and Taper):
Service limit: 0.010 mm (0.0004 in)
If the out-of-round or the taper is exceeds the service limit,
replace the crankshaft.
Crank pin outside diameter:
Standard: 18.990 – 19.000 mm (0.7476 – 0.7480 in)
POWER UNIT 6-27