Review on Chain Tensioners 1999 2006 Harley Models by George Evans

Only 1 (of 2 ordered) was usable, part was damaged in production and was not good. Part quality is poor, this is an example of you get what you pay for. If one wasn't damaged they would be serviceable parts. I can only assume they would need to be replaced sooner than the OEM factory interval as the plastic they use appears to be cheaper than OEM (but this is just a guess). If you need a part to get you riding again this will likely work (assuming your part is intact like I have) but I would recommend checking regularly for wear.