818 Repair Manual (CX) | Page 60

Supplement No. 1 to Manual 818-1 (CORR) cast iron wet-type removable barrels. b) Pistons : ~ pistons, in lead-coated ~ correct fitting : the arrow point towards the engine flywheel. PISTON IDENTIFICATION MARKS Class c) Piston rings : Correct fitting of piston rings : The mark « TOP » or the manufacturer's mark must face the crown of the piston. 1. Compression ring ( no mark ) 2. Oil scraper ring ( marked ). 3. Scraper-collector ring ( marked ) 3 or 4. ° NOTE : Since February 1976, the scraper ting (2) on 1985 cc engines is conical, and not « tooth-shaped ».