Powered by a high-performance 2-stroke engine with exhaust control system and 6-speed transmission the 125 SX has been further improved for the 2015 model year ensuring it will maintain its popularity with young champions in future. Motorcycles Motocross 1977 PSN . 2015 KTM 125 SX New the 125 SX has long since established itself as the undisputed top dog above all in junior race series and as a springboard to the professional leagues...

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