Connecting Rod; Crankshaft - Honda GX160 Tech Manual

CONNECTING ROD

Stock Honda rod with no alterations.
A. Connecting rod big end size:
B. Pin end bore is:
C. Length from bottom of pin bore to top of big end bore will be:
2.3755" maximum
D Rod weight with bolts:
.
E. No oil grooves on bearing surface of either end.

CRANKSHAFT

Stock Honda crankshaft with no alterations.
Notes:
A. No removal or addition of any metal from or to the crankshaft is allowed.
B. No balancing of the crank is allowed.
C. No oil grooving is allowed on the crank journal.
D. Governor drive gear cannot be removed.
E. Crankshaft drive gear should not be removed. This gear is installed by Honda to any accuracy of + ½
degree. If this gear is not installed to this degree of accuracy, engine may not be legal when camshaft is
checked by the procedure under engine block.
F. Keyway location must not be altered in any manner.
G. Measure thrust to crank gear side = 3.350 Min.
H. Factory heat treating markings must be present on gearbox end of crankshaft and must be evident on all
non –contact areas . The only cleaning method allowed is on the flywheel side of crankshaft for the
purpose of removing calcium, rust etc. from the exposed end of the crankshaft. This Is permitted only from
the seal groove out to the end of the thread of the crankshaft where the flywheel bolts on. Only a wire
wheel may be used in the cleaning process. The use of Scotchbrite, sandpaper or any other compounds or
abrasives is illegal. No material may be added or removed from crankshaft. Crankshaft main journal at
flywheel and gearbox ends may not be altered in any way. Thailand crankshafts have no heat treat marks.
NOTE: Refer to photo of crank color.
1.176 " minimum - 1.184" maximum
.710" ref.
2.3580" minimum
140 grams
18