GPX 250r TSE, Руководство по обслуживанию

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REMOVAL OF CYLINDER
The cylinder block removal steps are as follows:
1. Remove the cylinder head.
2. Remove the cylinder head gasket.
3. Remove the cylinder block.
NOTE : When removing the cylinder, the cylinder block
positioning pin cannot fall into the crankcase.
4. Scrape the remaining paper pad on the cylinder surface
with a scraper.
NOTE
: If the paper pad is immersed in gasoline, it is easy
to disassemble. When doing this work, avoid damaging the
cylinder contact surface.
CYLINDER INSPECTION
Check whether the cylinder is worn or damaged.
To measure the inner diameter of the cylinder, three
positions should be measured, namely the top A, the
middle B and the bottom C of the piston stroke, and the
two directions should be at right angles to each other.
A=10 B=60 C=100
Standard value of cylinder bore: 66.8
～
66.818
REMOVAL OF PISTON
Remove the piston pin retaining ring with pliers
NOTE
: Do not drop the retaining ring into the crankcase.
Press the piston pin out of the piston, and then remove the
piston.