Honda NSA700A DN-1 2009, Руководство по обслуживанию

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CYLINDER HEAD/VALVE
VALVE STEM, VALVE GUIDE
Check each valve fo r bending, burning, scratches or
a b n o rm a l w e a r.
In sert th e v a lv e s in th e ir o rig in a l p o s itio n s in th e cyl­
in d e r h e a d . C heck th a t each valve m o v e s up and
d o w n s m o o th ly , w ith o u t b in ding.
M e a s u re each v a lv e s te m O .D . and reco rd it.
SERVICE LIMITS: IN: 5.460 mm (0.2150 in)
EX: 5.455 mm (0.2148 in)
R e a m th e v a lv e g u id e to re m o v e a n y c a rb o n b u ild ­
up b e fo re m e a s u rin g th e g u id e I.D.
NOTE:
• T a k e care n o t to tilt o r lean th e re a m e r in th e
g u id e w h ile re a m in g . O th e rw is e , th e v a lv e s
m a y b e in s ta lle d s la n te d , causing oil leakag e
fr o m th e s te m seal a n d im p ro p e r v a lv e s e a t c o n ­
tact. T h is m a y p re v e n t v a lv e s e a t refacin g.
• In s e rt th e re a m e r fro m th e c o m b u s tio n c h a m b e r
sid e o f th e h ead a n d a lw a y s ro ta te th e re a m e r
clo ckw ise.
TOOL:
Valve guide reamer, 5.510 mm 07984-2000001 or
07984-2000001D
(U.S.A. only)
M e a s u re each v a lv e g u id e I.D . and reco rd it.
SERVICE LIMIT: IN/EX: 5.54 mm (0.218 in)
S u b tra c t each v a lv e s te m O .D . fro m th e c o rre s p o n d ­
in g g u id e I.D. to o b ta in th e s te m -to -g u id e cle a ra n c e .
SERVICE LIMITS: IN: 0.07 mm (0.003 in)
EX: 0.09 mm (0.004 in)
If th e s te m -to -g u id e c le a ra n c e e x c e e d s th e s e rvice
lim it, d e te rm in e if a n e w v a lv e g u id e w ith s ta n d a rd
d im e n s io n s w o u ld b rin g th e clearance w ith in to le r­
ance.
If so, rep lace a n y v a lv e g u id e s as necessary and
re a m to fit.
If th e s te m -to -g u id e c le a ra n c e e x c e e d s th e service
lim it w ith a n e w v a lv e g u id e , also re p la c e th e v a lv e .
NOTE:
Inspect an d reface th e v a lv e seats w h e n e v e r th e
v a lv e g u id e s a re re p la c e d (p ag e 9 -2 0 ).
G U ID E R E A M E R
9-17