Evotech Performance has developed an innovated spindle/bobbin system which allows the bobbin head to rotate on impact. The spindle sliders/bobbins are retained by roll threaded stainless steel spindles for increased strength. The spindle slider/bobbin kits comprise of two nylon bobbins, two anodized aluminum spacers, stainless steel spindle, nuts & washers. Made from high performance engineering materials in order to protect related items in the event of a spill. Please Note: If your axle has a cotter pin fitted this would have to be removed to fit this item. When fitting please take care that they will not make contact with any other part of the machine and there is adequate clearance when suspension is fully compressed or depressed. Particular care should be taken to ensure that there is adequate clearance between the sliders and the silencer can especially when a non-standard exhaust system has been fitted. Fits MT-09 - Years 2021 onwards.