ENGINE
4-69
CAM CHAIN FOLLOWER / TENSIONER
BLADES
1. Remove bolt securing tensioner blade to crankcase A.
2. Remove blades and inspect for cracks, wear, or damage.
PISTON REMOVAL
1. Remove cir-clip. Note that opening for cir-clip access is on
the exhaust side.
2. Remove piston cir-clip and push piston pin out of piston. If
necessary, heat the crown of the piston slightly with a propane
torch.
Do not apply heat to the piston rings. The ring may
lose radial tension.
3. Remove the compression rings, starting with the top ring.
*Using piston ring pliers: Carefully expand ring and lift it off
the piston.
4. When removing a piston ring, open the end gap with your
fingers and lift the other side of the ring over the piston crown.
Do not expand the ring more than the amount
necessary to remove it from the piston, or the ring
may break.
*By hand: Placing both thumbs as shown, spread the ring
open and pushes up on the opposite side. Use care to not
scratch the ring lands.
5. Repeat procedure for second ring.
6. The oil control ring is a three-piece design consisting of a
top and bottom steel rail and a center expander section.
Remove the top rail first followed by the bottom rail and
expander.
CYLINDER INSPECTION
1. Remove all gasket material from the cylinder sealing
surfaces.
2. Inspect the top of the cylinder for warp gage using a straight
edge and feeler gauge.
Cylinder Warp:
0.05 mm MAX
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