Inspection And Repairing - Yamaha SR250G Service Manual

INSPECTION AND REPAIRING and the lubication system [ump and
passag
Cylinder Head
4 . Remave the intake and exhaust tappet Standard shaft diameter:
covers. 11.975 ~ 11.990 mm
2. Insert a 6 mm (0.24 n) screw into the (0.471 ~ 0.472 in)
rovker shaft, and withdraw the rocker
It should bes! de out easily, sl
———————
If does not slide cut easily. use the special
tool 8s shown,
-
d- Standard clearance between the rockar
shaft and 708 should be 0,010 ~
0.043 mn (0.0004 ~ 90017 n)
measurement shows more than 0.1. mm
clearance, replace either or both parts
as necessary.
Compress the valve spring and then ra-
trove Volts retainer locks,
Remove the compressor and lift aff the
retainer and springs,
3, Rocker arm and rocker shaft y
2, The rockes arm ususiy wears at two
locations. (1) at the rocker snaft hole
(2) at the cam lobe contacting surface
b. Measure the rocker arm insicie diameter
$= NOTE
Standard si The retainer locks mignt he partis ly stuck in
12.000 ~ 12018 mm the retainer. Use 2 ruber hammer to tao the
(0.472 ~ 0.473 in} adye of the retainer a few times to locsen the
retainer locks
The shaft nes been nercened and it
should not wear excessively. If a groove
has developed in this surface that car
be felt. or if it shows a blue discolora
tion, then the shaft should be replaced
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