Suzuki GN125F, Service Manual

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E N G I N E
3-33
INSPECTION
Support the crankshaft with “V” blocks as shown.
Measure the crankshaft runout with the dial gauge.
Measure the big end of the conrod side clearance with a
thickness gauge.
09900-20803: Thickness gauge
09900-20606: Dial gauge (1/100 mm)
09900-20701: Magnetic stand
09900-21304: V-block
Conrod big end clearance limit: 0.5 mm
Crankshaft runout limit: 0.05 mm
Measure the gear shifting fork thickness.
Using a thickness gauge, check the shifting fork clearance in
the groove of its gear. If the clearance limit exceeds by any
gear, determine whether the gear or the gear shifting fork
should be replaced by measuring the thickness and groove
width.
09900-20803 Thickness gauge :
09900-20103: Vernier calipers
Measure gear shifting groove width.
09900-20103: Vernier calipers
Fork to groove clearance limit: 0.5 mm
Checking clearance
Checking thickness
Checking groove width
Fork thickness:
No.1 and 2: 4 No.3: 5.3-5.4 mm .8-4.9 mm
Gear shifting
No. : 5 No.3: 5.5-5.6 mm
groove width:
1 and 2 .1 mm