Section 04 ENGINE (2-STROKE)
Subsection 04 (TOP END)
787 RFI 28 (1.102)
947 DI 24 (0.945)
F01D0NA
1
A
1. Measuring perpendicularly (90°)topistonpinaxis
A. See previous table
ENGINE TYPE
MAXIMUM PISTON
SKIRT WEAR mm (in)
All 0.12 (.005)
The measured dimension must not be less than
0.12 mm (.005 in) of the one scribed on piston
dome. Otherwise, install a new piston.
Piston/Cylinder Wall Clearance
Used and New Pistons
IMPORTANT: Make sure used piston is not worn
more than specified. See USED PISTON MEA-
SUREMENT above.
To determine the piston dimension, take the mea-
surement on the piston dome.
F00D0EA
2 1
1. Piston dome
2. Piston measurement
Adjust and lock a micrometer to the specified val-
ue on the piston dome.
F00B08A
1
1. Micrometer set to the piston dimension
With the micrometer set to the piston dimension,
adjust a cylinder bore gauge to the micrometer
dimension and set the indicator to zero.
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