Derbi Dirtboy 10, Руководство по ремонту

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- Measure the piston outside diameter perpendicularly to the
piston pin axis.
- Take the measurement 27 mm from the piston top as
shown in the figure.
C
HARACTERISTIC
Piston diameter:
38,982 - 38,954
- Using a bore meter, measure the cylinder inside diameter
at three different heights in the directions shown in the fi-
gure.
- Check that the mating surface with the cylinder head is not
worn or distorted.
C
HARACTERISTIC
Standard cylinder diameter:
39,024 - 38,996
Maximum allowable runout:
0,05 mm
Pistons and cylinders are classified according to diameter.
Mating is obtained by matching class letters (A-A, B-B, C-C,
D-D).
I
NSPECTING THE PISTON
- Fit a comparator on the specific tool and then place both
parts on a surface plate.
- Reset the comparator on the surface plate. While main-
taining the resetting position, fit the tool to the cylinder and
fasten it with two nuts as shown in the figure.
- Rotate the crankshaft to the TDC (comparator rotation in-
version point).
ENGINE EE
- CYLINDER ASSY. AND TIMING SYSTEM
ENGINE
- CYLINDER ASSY. AND TIMING SYSTEM