wheel, remove the timing chain set on the timing driven
sprocket ;
5. Remove the M6×40 bolts connecting the
cylinder head and the cylinder block;
6. Remove 4 NC450 cylinder stud bolts AB (M
10×152), then remove 4 flat washers;
7. Remove the cylinder head;
Disassembly of the
cylinder head
1. Remove 1 screw M6×12, and remove
the NC450 camshaft pressure plate;
2. Remove the camshaft;
3. Remove the two NC250 rocker shafts on the
cylinder head cover for positioning
Bolt M14×1,
4. Remove 2 bolts M6×18 and 2 flat washers
lock up;
4. Remove the intake and exhaust rocker
arm shafts, and remove the intake and exhaust
rocker arms;
5. Press down the valve spring with the
valve remover and remove the valve lock clip;
then loosen the valve remover and remove the
valve spring seat, valve spring and valve.
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