Home › 49cc Timing Chain Tensioner 49cc Timing Chain Tensioner Default Title - $ 15.00 $ 15.00 Timing chain tensioner fits TAOTAO models ATM50-A1, CY50-A, CY50-B, CY50-T3, GT5-50, Thunder 50, New Speed 50, Zummer 50. Fits 49cc 139QMB engines Tweet Pin It