Aeon 350cc, Service Manual

Page: 57 / 192

ENGINE
4-57
CAM CHAIN TENSIONER REMOVAL
1. Remove oil fill cap from the stator housing and valve cover.
To position crankshaft at Top Dead Center (TDC) on
compression stroke:
2. Rotate engine slowly in the direction of rotation watching
intake valves open and start to close.
3. Continue to rotate engine slowly while watching camshaft
sprocket marks and the mark in the timing inspection hole.
4. Align single (TDC) mark on flywheel with in the inspection
hole, and the cam sprocket pin (facing upward) aligned with
the camshaft to crankshaft centerline.
NOTE: The sprocket marks align with gasket surface,
the cam lobes should be pointing down and the
valves should have clearance at this point.
5. Remove the two cam chain tensioner flange bolts.
CAUTION
The plunger is under spring tension.
Maintain inward pressure while removing.
6. Using a screwdriver, turn the tensioner clockwise to retract
the plunger. The plunger should move smoothly in and out of
the tensioner body.
7. Replace entire tensioner assembly if any part is worn or
damaged.
CAM CHAIN TENSIONER INSPECTION
1. Allow cam chain tensioner plunger to extend outward to the
end of its travel. Inspect tensioner
(A) and (B) plunger for wear or damage.
ROCKER ARM / SHAFT DISASSEMBLY AND
INSPECTION
NOTE: Orientation of the components is important for
reassembly. Mark all components before
disassembly.
1. Loosen each of the four cylinder head nuts evenly 1/4 turn
each time in a cross pattern until loose.