Arctic Cat ZR 120 Service Manual page 22


NOTE: Coat the cylinder wall, connecting rod bearing
surface, and the crankshaft with engine oil.
2. Install the crankshaft into the crankcase; then with
the piston rings properly oriented (end gap 120°
apart), compress the piston rings and install the
piston and connecting rod assembly taking care
not to damage the crankshaft and connecting rod.
CAUTION
The arrow of the piston must be directed towards the
push rod opening of the cylinder.
3. Note the marks on the connecting rod and end cap
made during disassembly.

NOTE: When installing the connecting rod to the
crankshaft, rotate the crankshaft so the rod journal is in
the six o'clock position to allow access for installing
the rod end cap.
4. With the connecting rod, end cap, and crankshaft
journal lubricated with engine oil, install the con-
necting rod and rod end cap to the crankshaft and
secure with the cap screws. Tighten evenly to 106
in.-lb.
IO091A
5. Apply lightweight oil to the tappets; then install
the tappets to the proper guides as noted during
disassembly.
6. Apply oil to the camshaft lobes and running sur-
faces on each end of the shaft; then with the crank-
shaft/piston rotated to TDC and the timing marks
of the crankshaft gear in-line with the camshaft
0745-001
gear, install the camshaft.
IO081A 7. Install the washer onto the governor control shaft
and slide the shaft up into position from inside the
crankcase far enough to install the hairpin clip.
IO080A
IO079A
IO078A
19