3-1
3. ENGINE
REMOVING THE CYLINDER HEAD ············· 3-1
CHECKING THE CYLINDER HEAD ·············· 3-2
CHECK THE TIMING CHAIN TENSIONER ····· 3-2
INSTALLING THE CYLINDER HEAD ············ 3-3
REMOVE THE ROCK ARMS AND CAMSHAFT 3-4
CHECK THE CAMSHAFT ··························· 3-4
CHECKING THE ROCKETER ARMS AND
ROCKER ARM SHAFTS ····························· 3-4
REMOVING THE VALVES ··························· 3-4
REMOVING THE PISTON ··························· 3-5
CHECKING THE TIMING CHAIN GUIDE ······· 3-5
CHECKING THE CYLINDER AND PISTON ····· 3-5
CHECKING THE PISTON RINGS ·················· 3-5
INSTALLING THE PISTON AND CYLINDER ·· 3-5
REMOVING THE CDI MAGNETO ROTOR ······ 3-6
INSTALLING THE CDI MAGNETO ROTOR ···· 3-7
CHECKING THE OIL PUMP ························· 3-7
ASSEMBLING THE OIL PUMP ····················· 3-8
INSTALLING THE OIL PUMP ······················ 3-8
CHECK THE STARTER WHEEL ··················· 3-8
CHECKING THE STARTER CLUTCH ············· 3-8
REMOVING THE PRIMARY SHEAVE ············ 3-9
REMOVING THE SECONDARY SHAEAVE ····· 3-9
SEPARATING THE CRANKCASE ················· 3-9
CHECKING THE CRANKCASE ···················· 3-9
CHECKING THE TIMING CHAIN AND TIMING
CHAIN GUIDE ········································· 3-9
CHECKING THE CRANKSHAFT ·················· 3-10
CHECK THE BEARINGS····························· 3-10
ASSEMBLING CRANKCASE ······················· 3-10
REMOVING THE TRANSMISSION ··············· 3-11
CHECKING THE SHIFT FORK ····················· 3-11
CHECKING THE SHIFT FORN ····················· 3-11
ASSEMBLING THE MAIN AXLE ·················· 3-12
INSTALLING THE SHIFT FORK AND SHIFT
DRUM ···················································· 3-12
INSTALLING THE SHIFT LEVER·················· 3-12
REMOVING THE CYLINDER HEAD
1.Align：
“I”make “a” on the CDI magneto rotor （with the
stationary pointer “b” on the CDI magneto rotor）
When the piston is at TDC on the
Compression stroke，align the punch make “c”on
the camshaft sprocket with the mark“d”on the
cylinder head.
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