hi 5; what does the icon mean? if you have a reactor supply co. near you, get parts--#165-063 tensioner w/roller---#165-280 spring. they are in the off road/go cart sect. if not you can drill small hole through tens. and bik frame and put in a small screw. if you dont fix it it will derail and wipe out spokes and maybe a highside. good luck mitch