Installation Of Piston - Generic TR 125 Service Manual

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Measure Connecting rod small end ID.
Allowable limit: Φ15.068mm

Installation of piston

Install location pin.
Apply engine oil evenly on each piston ring and
piston. Install piston to its place with bevel upward.
Attention:
Piston shall not be scratched and piston ring shall not
be broken.
When the piston ring is installed, it can rotate freely
in the piston ring groove.
Scrape the washer attached to the crankcase.
Attention:
No foreign matters can be dropped into the
crankcase.
Install piston, piston pin and piston pin retainer.
Attention:
The larger side of the groove at the piston head
should be installed towards the intake valve.
Install Cylinder
Install washer and location pin onto the crankcase.
Apply evenly engine oil on inner wall of cylinder, piston and piston ring.
Install carefully the piston ring into the cylinder.
Attention:
Do not hurt piston ring.
Connecting rod
small end ID
- 112 -
Top ring
Second
ring
Oil ring

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