Laboratory flow analysis proves Boyesen® dual-stage reeds out-perform standard reeds.
They permit greater flow velocity over the entire range of operating pressures.
Increased performance from start-up to top acceleration.

2001 Maico 500 Supermoto
1991-1992 Maico GS 250
1991-1992 Maico GS 350
1991-1992 Maico GS 360
1991-1992 Maico GS 490
1991-1992 Maico GS 600
1989-1990 Maico Enduro 250
1989-1990 Maico Enduro 320
1988 Maico GP 360 E
1987-1988 Maico GP 250 E
1987-1988 Maico GP 500 E
1987 Maico GP 400 E
1984-1986 Maico GME 250
1984-1986 Maico GME 500
1978-1983 Maico MD 250 WK
1975-1976, 1978-1979, 1992-2009 Maico 400 Enduro
1973-1977 Maico MD 250 -6
1971-1972 Maico MD 250
1954-1966 Maico Maicoletta 277