46 – English
Repair instructions
Check the following:
• The surface coating of the cylinder is not worn
through, especially in the upper part of the
cylinder.
• The cylinder is free from score marks and
areas of wear.
• The piston is free from score marks. Small
scratches can be polished out with fi ne emery
paper.
• The piston ring is freely moving in its groove.
(see fi gure 55)
• Measure piston ring wear. This should not
exceed 1 mm. (see fi gure 56) Use the piston to
push the piston ring for correct alignment.
• The needle roller bearing is undamaged.
• The intake manifold is undamaged.
• That the air hoses and impulse hose are unda-
maged.
• Pressure test the decompression valve.
Fig 56
Fig 55
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