The Yamaha YZ125 is a motocross racing motorcycle with a twostroke 124.9 cc (7.62 cu in) displacement singlecylinder engine made by Yamaha since 1974. It is available to the public. For the first two years it was made with dual rear shocks, then changing to a monoshock. The YZ125 has been ridden to five AMA National Motocross Championships, and multiple AMA Regional Supercross …
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