Valve Clearance/Decompressor System; Secondary Air Supply System; ('04 - '06 California Type, After '06) - Honda 2004 CRF250X Service Manual

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MAINTENANCE
SECONDARY AIR SUPPLY SYSTEM
('04
-
'06 California type, After '06)
Check the air supply and air suction hoses for dam-
age or loose connection.
Check the vacuum hose between the
cylinder
head
vacuum
joint
and PAIR control valve for deteriora-
tion, damage or loose connection.
Also check that the hose is not kinked or
pinched.
VALVE CLEARANCE/DECOMPRESSOR
SYSTEM
VALVE CLEARANCE INSPECTION
Inspect and
adjust
Remove the cylinder head cover (page
8-6),
the valve clearance
Remove the crankshaft hole cap and D-ring
.
whIle the engine IS
cold (below 35'C1
95Of)
3-14
Turn the crankshaft
clockwise
to align the punch
mark with the index mark on the right crankcase
cover.
Make sure the piston is at TDC
(Top
Dead Center) on
the compression stroke.
The index line on the cam sprocket must be flush
with the cylinder head surface as shown.
PUNCH MARK
~

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2005 crf250x

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