Suzuki TU250X - Page 351

SERVICING INFORMATION 10-31
CAMSHAFT + CYLINDER HEAD Unit: mm (in)
CYLINDER + PISTON + PISTON RING Unit: mm (in)
ITEM STANDARD LIMIT
Cam height
IN.
33.84 – 33.89
(1.332 – 1.334)
33.54
(1.320)
EX.
33.30 – 33.35
(1.311 – 1.313)
33.00
(1.299)
Camshaft runout
—
0.10
(0.004)
Rocker arm I.D.
IN. & EX.
12.000 – 12.018
(0.4724 – 0.4731)
—
Rocker arm shaft O.D.
IN. & EX.
11.983 – 11.994
(0.4718 – 0.4722)
—
Cylinder head distortion
—
0.05
(0.002)
Cylinder head cover distortion
—
0.05
(0.002)
ITEM STANDARD LIMIT
Compression pressure
1 200 – 1 400 kPa
(12 – 14 kgf/cm², 171 – 199 psi)
850 kPa
(8.5 kgf/cm
2
,
121 psi)
Piston to cylinder clearance 0.020 – 0.030
(0.0008 – 0.0012)
0.120
(0.0047)
Cylinder bore 72.000 – 72.015
(2.8346 – 2.8352)
Nicks or
Scratches
Piston diam. 71.975 – 71.990
(2.8337 – 2.8342)
Measure at 10 mm (0.4 in) from the skirt end.
71.880
(2.8299)
Cylinder distortion
—
0.05
(0.002)
Piston ring free end gap
1st N Approx. 10.0 (0.39)
8.0
(0.31)
2nd N Approx. 11.0 (0.31)
8.8
(0.35)
Piston ring end gap
1st N
0.10 – 0.22
(0.004 – 0.009)
0.50
(0.020)
2nd N
0.22 – 0.34
(0.009 – 0.013)
0.70
(0.028)
Piston ring to groove clearance
1st —
0.180
(0.0071)
2nd —
0.150
(0.0059)
Piston ring groove width
1st
1.01 – 1.03
(0.0398 – 0.0406)
—
2nd
1.21 – 1.23
(0.0476 – 0.0484)
—
Oil
2.51 – 2.53
(0.0988 – 0.0996)
—