Honda GX160 Tech Manual page 12

NOTE: All measurements taken at top of bore or very bottom of bore.
"Wear Limits/Parts Out Of Service" QMA reserves the right to confiscate 160 Honda engine
parts deemed illegal or at QMA maximum wear limits. EXAMPLE: Cylinder Bore will be 2.681
Max. All measurements taken at top of bore or very bottom of bore parallel to crank, 90 degrees
from crank. Any cylinder block that has one measurement over QMA maximum wear limits will
be taken out of service. If no measurements exceed QMA maximum wear limits the part of block
will not be confiscated. Handler has the right to have confiscated parts returned to them but will
be rendered unusable
Check stroke: 1.778 maximum to 1.758" minimum
Measure amount that piston is up or down from block surface at T.D.C. This will be measured at edge or
highest part of piston, not in center or relieved area.
This dimension will be: 0.000" Maximum NO PISTON POP UP
Install degree wheel on flywheel. Install pointer in order to read degrees. Locate accurate T.D.C. This
should be done with a positive stop type fixture and not established with indicator alone.
Cam will be checked with indicator reading off the top end of tappets, which will provide zero clearance.
The inverted radius of the top of the tappet presents some problem to get accurate readings and to prevent
binding of indicator stem. Indicator holder and positions are very critical in this operation
.
Zero indicator on base circle of cam. Be sure that compression release does not affect zeroing exhaust
indicator. Zero dial indicator after exhaust bump ( 0.050) ref.
Turning engine in normal rotation, clockwise facing flywheel, take reading at specified opening.
Readings must fall between specified degrees on the following chart.
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