Yamaha RS90K Manuel D'atelier page 558

CRANKCASE
14. Lubricate:
• Piston
• Piston rings
• Cylinder
Recommended lubricant:
Engine oil
15. Lubricate:
• Bolt threads
• Nut seats
(with the recommended lubricant)
Recommended lubricant:
Molybdenum disulfide grease
16. Lubricate:
• Crankshaft pins
• Big end bearings
• Connecting rod inner surface
(with the recommended lubricant)
Recommended lubricant:
Engine oil
17. Install:
• Big end bearings
• Connecting rod assembly 1
(into the cylinder and onto the crankshaft pin).
• Connecting rod cap
(onto the connecting rod)
NOTE:
• Align the projections on the big end bearings with
the notches in the connecting rods and connect-
ing rod caps.
• Be sure to reinstall each big end bearing in its
original place.
• While compressing the piston rings with piston
ring compressor 2, install the connecting rod
assembly into the cylinder with the other hand.
• Make sure that the "Y" marks a on the connect-
ing rods face towards the A.C. magneto.
• Make sure that the characters b on both the con-
necting rod and connecting rod cap are aligned.
Piston ring compressor:
90890-05158, YM-08037
5-70
ENG