Evolution Industries EVO-1070-1205 The Bump Stop Primary Chain Adjuster Stop for Big Twin 07-Up ModelsHigh Horsepower Engines cause the O. E. tensioner to over tension the primary chain during hard acceleration. The Bump Stop eliminates this over tensioning from the chain adjuster on 07 & Later Big Twin (Also 06 Dyna). The Bump Stop provides a physical impediment to the ratchet function of the tensioner; While the spring mechanism remains in place for proper tensioning. Made from high quality steel and black oxide coated for corrosion resistance.
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Evolution Industries EVO-1070-1205 The Bump Stop Primary Chain Adjuster Stop for Big Twin 07-Up Models