Motor cylinder set 38.40 mm bolt 12 - Piaggio Ape 50 FL- RST / Vespa 50 S / Special / PK 50 / PK 50 XL / FL / HP 2T 50cc - RMS

Motor cylinder set RMS. Among the most important applications are: Piaggio 50cc: Ape 50 FL (1989-1995) / Ape 50 FL2 (1989-1995) / Ape 50 P (1980-1985) / Ape 50 RST Mix (1999-2003) / Vespa 50cc: 50 / N (1963-1971) / 50 L (1966-1970) / 50 R (1969-1983) / 50 Revival (1990-) / 50 S (1963-1984) / 50 Special (1969-1972) / 50 Special (1972-1975) / 50 Special (1975-1983) / 50 Special Elestart (1969-1972) / 50 Special Elestart (1972-1975) / 50 Special Elestart (1975-1976) / 50 SP / Sprinter (1971-1979) / 50 SS / Super Sprint (1965-1971) / PK 50 (1982-1984) / PK 50 S / Elestart (1982-1984) / PK 50 SS / Elestart (1983-1986) / PK 50 XL / Elestart (1985-1990) / PK 50 XL FL (1990-) / PK 50 XL HP (1991) / PK 50 XL N NUOVA (1989-1990) / PK 50 XL Rush / Elestart (1988-1990) / PK 50 XL2 / Elestart (1990-).

Olympia equivalent: OL.71623C;
Piaggio OEM code: 122457;

Features:
- The cylinder has 3 intake and exhaust ports;
- Piston pin diameter: 12 mm;
- Piston diameter: 38.40 mm;
- Skirt diameter (crankcase guide): mm.

Features - piston dimensions:
- Piston diameter (D): 38.40 mm;
- Center distance pin - piston head (C): 26.00 mm;
- Dome (H): B-4 mm;
- Total piston length (L): 52.00 mm.

Features - pin dimensions (d):
- Outer pin diameter: 12 mm;
- Inner pin diameter: 8 mm;
- Pin length: 31.50 mm.

Features - ring dimensions:
- Number of rings: 2;
- Ring thickness:
- 2 rings mm;
- Ring type: G15H;
- Ring closure: lateral;
- Rings.