4-12 ENGINE TOP END
Camshaft Sprocket Installation
Check crankshaft position to see that the "T" mark [A] on
the magneto flywheel aligns with the index mark [B] on
Remember to pull the camshaft chain taut before rotating
Pull the lower side of the chain taut and fit it onto the
sprocket so that the line [A] on the sprocket aligns with
the mark on the sprocket cover mating surface projection
Fit the sprocket up into place.
Turn the camshaft so that the cam lobes point downward,
while holding the sprocket steady to align the bolt holes
Install the sprocket [B].
Apply a non-permanent locking agent to the camshaft
Keep the crankshaft from turning by holding a wrench on
the magneto flywheel bolt.
Tighten the sprocket bolts.
Torque - Camshaft Sprocket Bolts: 12 N·m (1.2 kgf·m, 104
Install the camshaft chain tensioner.
Check the camshaft chain timing.
Turn the crankshaft two turns in the counterclockwise, the
crankshaft is at TDC, and re-check the camshaft chain
If the timing mark is aligned, the camshaft chain timing is
Rotation of the crankshaft with improper camshaft
timing could cause the valve to contact each other
or the piston, and bend.
If any resistance is felt when turning the crankshaft,
stop immediately, and check the camshaft chain