2004 Ski-Doo REV Series Factory Service Manual, Page 67Get this manual

2004 Ski-Doo REV Series Factory Service Manual, Page 67

Quality of the image is intentionally reduced!

Section 03 TROUBLESHOOTING Subsection 01 (ENGINE)
NORMAL USE4 Melted andor perforated piston dome; melted section at ring end gapaWhen piston reaches TDC, mixture is ignited by heated areas in c