Yamaha QT50 Service Manual page 56

1 Reed valve assembly
2 Rood valve
3 Aced valve stopper
4 . Punhead screw
5 Sprong washer
6 Reed valve plate
7
Valve seat packing
1
8 Valve seat packing 2
9 Manifold
10
Panhead screw
4 . Valve stopper
~10
~
~8
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~ 4
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I u--5 I
: ~~6 :
1 ~·0@~
0 :
I 0 I
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2 I
I I
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,_ - - - - - _ _J
7 -0
4. Butee des clapets
I. En:-.. du1'>4.:t:\ Oi::itihlc~
2.
Lame~
O..:xihle-:
J.
Buice'
<J.:., lan1e> Ocxihlcs
4 . V1:i.
ii l~I~
tron\!oniqu..:
5. Ro111klk
Gro"w
f,,
Plaqu..:
J¢._,
lumc:i. ncxiblc:>
7. Joinl I de ,;.;l(c des dape1s
II.
)1•111
2 de ,;q,.c
U.-s
calpcts
'I Tuhulurc
10.
V" a lclc lrtMh.:onique
The valve stopper cont rols the move-
ment of the valve. Check clearance "a".
La butee des clapets controle le mouve-
ment des lames. Controler le jeu "a".
Valve stopper clearance:
4 .8 ± 0.2 mm (0.19±0.008 in)
Read dist ort ion limit: 0 .3 mm (0 .01 2 in)
NOTE : -~~~~~~~~~~~­
lf clea rance "a" i§ larger than specified. the
valve will be broken. If smaller. engine per-
formance can be impaired.
4 -4
Jcu de butee des clapets: 4.8
±
0.2 mm
Limite de distorsion de lame: 0.3 mm
N.8.: - - - - - -- - - - - -- - -
Si le jcu "a" est superieur
a
la valeur specifiee,
les clapets se casseront.
s·il
est inferieur. le re-
ndement du moteur peut etre alTecte.