Underbone
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An underbone is a type of motorcycle that uses structural tube framing with an overlay of plastic or non-structural body panels and contrasts with monocoque or unibody designs where pressed steel serves both as the vehicle's structure and bodywork. Outside Asia, the term underbone is commonly misunderstood to refer to any lightweight motorcycle that uses the construction type, known colloquially as step-throughs, mopeds or scooters.
Plastic panels and covers are widely used on modern underbones e.g. Modenas Kriss 2.
MCX Raptor, an underbone from the Philippines.
Honda Winner, an underbone with 150 cc engine displacement.
Plastic panels and covers are widely used on modern underbones, such as a Suzuki FX125
MZ Motorrad- und Zweiradwerk
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Motorenwerke Zschopau GmbH is a German motorcycle manufacturer located in Zschopau, Saxony. The acronym MZ since 1956 stands for Motorenwerke Zschopau GmbH. From 1992 to 1999 the company was called MuZ, an acronym for Motorrad und Zweiradwerk.
1960s Enduro victories
MZ enduro team, 1968
MZ RE 125 of 1972
MZ-Cup – amateur racing series since 1996 (Image: Sachsenring 2020)