Suzuki UG110 2021, Service Manual

Page: 193 / 198

SERVICING INFORMATION 7-21
SERVICE DATA
CY PISTON RING
Unit: mm
ITEM STANDARD LIMIT
Piston to cylinder clearance 0.035 – 0.045 0.120
Cylinder bore 52.500 – 52.515
52.595
Measure at 20 mm from the top surface.
Piston diam. 52.460 – 52.475
52.380
Measure at 20 mm from the skirt end.
Cylinder distortion ——— 0.05
Cylinder head distortion ——— 0.05
Piston ring free end gap 1st &
R Approx. 4.5 3.6
2nd
Piston ring end gap 1st &
R 0.10 – 0.25 0.80
2nd
Piston ring to groove clearance 1st &
0.03 – 0.07 ———
2nd
Piston pin bore 14.002 – 14.010 14.030
Piston pin O.D. 13.995 – 14.000 13.980
CRANKSHAFT
Unit: mm
ITEM STANDARD LIMIT
Conrod small end I.D. 18.000 – 18.008 18.040
Conrod deflection ——— 3.0
Crank web to web width 40.0 ± 0.1 ———
Crankshaft runout ——— 0.05
OIL PUMP
ITEM SPECIFICATION
Oil pump reduction ratio 25.000 (25/1)
Oil pump discharge rate 1.1 – 1.4 ml
(Full open) for 3 minutes at 2 000 r/min
CLUTCH
Unit: mm
ITEM STANDARD LIMIT
Clutch wheel I.D. 110.00 – 110.15 110.50
Clutch shoe thickness 5.0 4.0
Clutch engagement 2 800 – 3 400 r/min. ———
Clutch lock-up 5 100 – 6 100 r/min. ———
REDUCTION GEAR + DRIVE BELT
Unit: mm Except ratio
ITEM STANDARD LIMIT
Reduction ratio Variable 2.719 – 0.778 ———
Final reduction ratio 7.921 (43/19 × 63/18) ———
Drive belt width 19.5 18.5
Movable driven face spring
110 104.5
free length