#
PISTON, PISTON RING, PISTON PIN [L3]

BME011011010T02

## Structure

• The pistons are made of aluminium alloy, which with stands heat and is highly conductive.
• The piston skirt is coated with graphite to reduce friction.
• The offset pistons are used to reduce piston-slapping noise.
• To prevent the piston from being reassembled in the wrong direction, the front mark (←) is on the piston.
• Pistons and connecting rods cannot be disassembled because they are shrinkage fit.

Piston Specification.

ITEM | L3
--- | ---
Outer diameter | mm {in} | 87.465-87.495 {3.4435-3.4446}
Offset quantity | mm {in} | 0.8 {0.032}
Compression height: HC | mm {in} | 28.5 {1.122}
Piston height: HD | mm {in} | 51.0 {2.0078}

1 | Piston side view
2 | Piston pin center
3 | Cylinder bore csnter
4 | Offset
5 | Outer diameter
6 | Piston upper view
7 | Install arrow facing engine front
8 | Engine front side

• The following piston rings have been adopted: Barrel face ring for top ring, taper under cut ring for second ring, two scuff rings and an expander for oil ring.
• The piston pin is made of chrome steel alloy, which has superior rigidity.
• The connecting rod and the piston pin are shrinkage fit, so that it cannot be disassembled.

1 | Top ring sectional view
2 | Second ring sectional view
3 | Oil ring sectional view
4 | Side rail
5 | Expander