Kolben Malossi Ø 44,5mm C, Kolbenbolzen Ø 12mm, 2 Kolbenringe trapezförmig

MBK ZX 50 (2-Takt) (Luft)
Yamaha DT50 (29J-H/54Y) (bis Bj. 1987) (Luft)
Yamaha DT50E (1RE) (bis Bj. 1987) (Luft)
Yamaha DT50M (1JY/1M/2F/3T/4E/5M) (Bj. 1986 - 1992) (Luft)
Yamaha DT50MX (2JN) (Bj. 1987) (Luft)
Yamaha DT50R (3HL/3MN/3MP/3MR/4A/4C) (bis Bj. 1996) (Luft)
Yamaha RD50M (2L/2E/2P) (Luft)
Yamaha TY 50 M