Since the major rule changes in Motocross to make 4-stroke bikes more competitive in motocross and being given a 125 cc 2-stroke to 250 cc 4-stroke advantage the cheaper, simpler 2-stroke bikes have been dying out. Since other manufacturers have decided to discontinue their 2-stroke models, KTM has continued with creating and improving their 2-stroke models and taking up a very high proportion of the 2-stroke bike market.

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