Tomei Powered PISTON KIT - Manual (Page 20)

（１）PISTON MARK POSITIONING
Pay attention to the position of the Piston Marking prior to assembly.
CAUTION
If the Pistons are installed
facing the wrong way, the
performance will not be the
same and you'll risk possible
damage to the pistons and
the engine.
（２） PISTON RING CONFIRMATION
Note the positioning of the Piston Rings when installing the Tomei Piston Kit.
①Piston Ring Upper & Lower Side
Install the ring with the ring mark facing up.
RH side LH side
Top Ring
Second Ring
Ring Mark
[TOMEI EJ25/26 Piston notes]
Piston mark facing the front side. Piston mark facing the rear
②Oil Ring Side Rail Gap
The Oil Ring Side Rail Stopper must
be positioned against the raised
stopper part of the Piston (as shown
on the left).
20
Piston Mark
Lower Side Rail Stopper Side Rail Upper Side Stopper
Oil Ring Stopper