37. ADJUSTMENT OF INlET AND EXHAUST VALVE ClEARANCES
(0.3 mm with engine cold): ;'!;:~~.y?~~~'~:
Adjust initially after 50-100 running hours and stib~.t1y af.ter every 600
running hours or if starting difficulties are experienced. '"
~. ,
, g,-
1. Unscrew both 'startiirg'cigarette plugs
2 3 (1). Free the spnng at the rear end of
I ' EX IN
@ the cylinder head, unscrew the rocker
cover bolts and lift the cover (2) off.
- ~ v .
~ ~ ;:: -- . 2. Tü.rn the' flywheel until the pi.ston in
~ ~~v '" cylmderN01(nearestflywheel)lsatthe
i . ~ '
~ to~ of its travel and both valves lor
" ~ cylloder No 1 are closed. (Push rods
~ ~ // 1 free to move.
4 '" - '., 'r, I f See top dead centre mark (ruC) on the
I . IJ !~r~~~~ flywheel guard and on the flywheel
.. ,," ~-~::~~::: (single mark),
l"i/,~A / 3, Insert valve clearance feeIer gauge (3)
""
# / /1 -(0.3 mm) between rocker arm and
(',/ ' valvestem. Slackenoffnut(4). Usinga
,,~ screwdriver, set the adjusting screw so
Fi t~at the ~eeler can be móved with only
g,52 sllght reslstance.
Re-tighten nut (4) and check clearance again. Transfer feeier gauge to exhaust
valve (EX) and set the same clearance as lor the inlet valve.
4. Similarly lor cylinder No. 2: Turn the flywheel until the piston in cylinder No 2 is
at the top of its travel and both valves are closed. (Both push rods tree to move.)
See TDC mark on the flywheel guard and twin marks on flywheel. Continue as in
item 3 above.
. , 38. ADJUST.NG DECOMRESSOR VAlVE
With decompressor handle (C) in lower (open) position the engine should be easy to .
0 A B 8 A C.~ A
-
C
al
.. i u
~ ~ ;é';"
'" E ;:
E
~.
~"
Fig, 53
40 IN E
\~~~:' ,- -' ~~
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