Release 00 - 03/2018
Engine RS100 - RSC100
page 45
Service manual
0,15÷0,20 mm
0,15÷0,20 mm
14. ENGINE BLOCK - External operations
14.2. Adjusting the valve clearance
WARNING: The adjustment must be made
with the engine is cold.
1 - Remove the cover and demount the spark plug
[
14.1].
2 - Remove lid (5) which is secured with three screws
(6) and remove the washer (7).
3 - Manually set the piston to the TDC (Top Dead
Centre) of the compression stroke so that both
valves are closed.
4 - Use a feeler gauge (8) to check the gap betwe-
en the rocker arm and the tip of the valve stem; the
gauge should pass between without forcing and
without a further gap.
5 - Slack is adjusted by loosening the dowel (9) and
suitably adjusting the register nut (10) to obtain the
following values:
Inlet - IN = 0,15 - 0,20 mm
Exhaust - EX = 0,15 - 0,20 mm
6 - Following adjustment, check that the pushrods
(11) are properly inserted in the rocker arm housings
(12) and always fully tighten the dowel (9).
7 - When reassembling check the condition
of the gasket (7) of the cover (5) and replace it if
it is damaged. Tighten the screws (6) to the torque
indicated.
8 - Assemble the spark plug [ 14.1].
5
5
10
10
10
9
7
8
12
12
9
9
9
11
11
6
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