replaced the spring loaded tensioners in mine a few months ago . bike had done 28,000kms ,outside tensioner wasnt to bad but inside tensioner was pretty crook. bike has been serviced every 4000kms and use mobil 1 vtwin oil. replaced the whole lot with the screaming eagle hydraulic tensioner upgrade kit with the better oil pump. Also fitted SE211 cams at the same time. was done by a local independant harley mechanic complete job $1890.00