Honda CRF450R 2009 Service Manual page 15

GEN ERAL INFORMATI ON
CYLINDER HEADNALVES SPECIFICATIONS
,,;;;:;;:~_
Unit: mm (in)
ITEM
,,---=--t~:;::~
STANDARD .. SERVICE LIMIT
t---c ylinder
compresslon : -- ' ='-
- - - "09 '12 392 kPa (4.0 kgf/cm
1 ,
57 psi) a1600 rpm
l
After ' 1 2 647 kPa (6 6
kgf/cm2,
94 psi) at
sii; oo2:"' : Om :--
i
t-'--- -
LSylinder
head
warpage - - - - - 0.05 (0.002)
Valve and
i
Valve clearance
~
IN 0.16 ± 0.03 (0.006 ± 0.001)
valve guide EX _ 0.28
:t
0.03 (0.011
:t
0.001)
Valve stem 0 .0 . ----4---ii 'N :i'-
4 .975~990
(0.1959 0.1965) < -_ _ _
_ _
-r:~E~X==+~4.965
4.980 (0.1955 -0.1961 ) 4.96 (0.195)
IN 5.000---=-5.012
(03969---=-O. 1 9:c7~3:i- )
_ _ _
t
5.05- 2 -(0 -.1989) ---1
= =:-l---ii E X _ _ -t-S.OOO 5.012 (0.1969 0.1973) 5.052 (O.1989)
Stem-Io-guide clearance IN 0.010 - 0.037 (9.0004 0.0015)
EX 0.020 0.047 (0.0008 0.0019)
Valve guide 1.0.
f
Valve guide projection
r
IN _ 14.8 15.0 (0.58 0.59)
L
above c"y'''' ;n:;; d."'"h.:. ea : :: d '---_+-"E,,X _ _
+ +. 17.8
18.0 (0.70 0.71)
Valve seat width I IN 1.1 - 1.3 (0.04 - 0.05) 2.0 (0.08)
EX f-- , 1 .3 - 1.5 (0.05 0.06) 2.0 (O.OB)
Valve spnng free length IN 40.72 (1.603) 40.6 (l .BO )
EX 42.30(1 .665) 42 .1 (1.66)
Rocker arm" l."O'.
--~
_ _ _
-+
12.000- 12.018 (0.4724 - 0.4731') - - 12.oi5 (0.4734)
f
ROCker arm shaft O.D. 11 .977-11 .985(0.4715 - 0.4718) , 11 .97(0.471)
Rocker arm-la-shaft clearance 0.015 - 0.041 (0 .0006 - 0.0016) -----ro.055 (0.0022)
Cam tobe heighl IN 37 .540-37 .780(1.4779-1.4874) I 37 .52 (1.477),
EX 28 .598 - 28.838 (1.1259- 1.1354) I 28 .58 (1.125)
Rocker arm
~
Camshaft
Valve lifter 0 .0 .
Valve lifter bore 1.0.
25 .978 - 25.993 (1.0228 1.0233) 25.97 (1 .022 )
26.010 - 26 .026 (1 .0240 1.0246) 26.04 (1 .025)
CYLINDERlPISTON SPECIFICATIONS
Cylinde;:--
Piston,
piston ring
ITEM
---, l.O.
r
Oul-of-round
;
Piston 0.0.
STANDARD
---1--'96.00" 0 ' 9"'6".015 (3.7795 3.7BO"1) ' - - -
Unit: mm (in)
SERVICE LIMIT
96 .025 (3.7805L
j
_ _ ;;:0.0:5,
~®~~
.= = 0-,
;;-_ _ ,, "':;W
toward the in .. t.a;;,:e;i' , ,,, ;d,, e _-'-o.co,n
'09 -' ·
~.
Piston pin (0.749)
Piston pin 0 .0 . ----+--J,8.994 - 19.000 (0.7478 - 0.7480) 18.99 (0.748)
t
r--Piston-to-Plston pin clearance
I
0.002 0.014 (0.0001 - 0.0006) 0.04 (0.002)
Top ring mark "R" mark side facing up _ _ _
-+ ____ _
Piston ring-la-ring Top 0.065 _ 0.100 (0.0026 _ 0.0039) 0.12 (0.004)
groove
clearance -==-~",,==-_-+-
Piston ring end gap Top ring 0.25 - 0.31 (0.010 - 0.012) 0.32 (0.013)
~
ring:" - - - ' "
f
I
Cylinder-ta-piston clearance
Connecting rod small end I.D.
Connecting rod-ta-piston pin clearance
(side rail) 0.20 - 0.70 (0.008 - 0.028) 0.71 (0.028)
-~-'
0.020 0.045 (0.0008 - 0.0018) 0.085 (0.0033)
- - f -
19.016 19.038 (0 .7487 - 0.7495) 19.05 (0.750)
_--,--,0.016 - 0.044 (0.0006 0.0017) 0.06 (0.0021
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