CF MOTO CF400-A 2017, Service Manual

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9-22
CFMOTO
Crankshaft and Connecting Rods
Connecting Rod Bend
●
Remove the connecting rod big end bearing inserts,
and reinstall the connecting rod big end cap.
●
Insert the arbor [A] through the connecting rod big
end.
●
Select an arbor of the same diameter as the piston
pin and at least 100 mm (3.94 in.) long, and insert the
arbor [B] through the connecting rod small end.
●
On a surface plate, set the big-end arbor on V block
[C].
●
With the connecting rod held vertically, use a
height gauge to measure the difference in the
height of the arbor above the surface plate over a
100 mm (3.94 in.) length to determine the amount
of connecting rod bend.
★
If connecting rod bend exceeds the service limit,
the connecting rod must be replaced.
Connecting Rod Bend Service Limit
:
0.2
mm
Connecting Rod Twist
●
With the big-end arbor [A] still on V block [C].
●
Hold the connecting rod horizontally.Measure the
arbor[B] hight different to see the twist.
Connecting Rod Twist limit: 0.2mm
Connecting Rod Big End Side Clearance
●
Measure connecting rod big end side clearance.
:First to let the connecting rod big end to paste a
side of the joint
.
Then insert a thickness gauge [A]
between the big end and either crank web to deter-
mine clearance.
Connecting Rod Big End Side Clearance
Standard 0.15~0.30mm
Service Limit: 0.55 mm