Head, Cylinder And Piston - Yamaha ttr230 Service Manual

ENGINE MOUNTING AND ADJUSTMENTS
HEAD, CYLINDER, AND PISTON
1. Apply:
• Engine oil 4T
(Piston rings and pin)
2. Install:
• Piston rings
NOTE:
Install the rings with the brand mark up.
3. Install:
• Piston 1
• Piston pin 2
• Piston pin locks 3
NOTE:
• The piston arrow 4 should be facing
the front part of the engine.
• Before installing the piston pin locks,
cover the engine case using a cloth in
order to prevent the locks from falling
into the engine.
4. Ring opening positions:
• Top ring
• Bottom rings
As the arrangement shown in the figure:
Compression ring 1
Oil ring (bottom) 2
Oil ring (top) 3
Scraper ring 4
4-78
ENGINE