Fitting Piston Rings, Piston And Cylinder - Derbi GPR 125 Racing Workshop Manual

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ITTING PISTON RINGS ITTING PISTON RINGS
1. Fit according to the following sequence:
- Secondary ring (scraper) (1).
- Top ring (compression) (2).
N.B.
- LUBRICATE THE PISTON AND THE RINGS WELL WITH EN-
GINE OIL.
2. Fit:
- Piston
- Connecting rod big end needle bearings
- Gudgeon pin
- Circlip
N.B.
- APPLY ENGINE OIL TO THE GUDGEON PIN.
- THE ARROW ON THE PISTON SHOULD BE TOWARDS THE
EXHAUST SIDE.
- BEFORE FITTING THE CIRCLIP, COVER THE CRANKCASE
OPENING WITH A CLEAN CLOTH.
3. Fit:
• Guide pins (1).
• Cylinder gasket.
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PISTON AND CYLINDER PISTON AND CYLINDER