BSA Singles Valve Spring Kits by Kibblewhite - Choose Valve Spring Kit Type / Application Kit Type - Application:B50 / B50MX / TR5MX Spring Kit W/ Retainers - 1971-1973 Part replaces Triumph part 57-1157

Part replaces Triumph part 57-1157 and T1157

Replace your Norton Commando twin rod bearings with this high quality USA made rod bearing set

Chances are your primary chain tensioner is worn and is need of replacement

This filter is Fully Rebuildable

BSA Singles Valve Spring Kits by Kibblewhite - Choose Valve Spring Kit Type / Application Kit Type - Application:B50 / B50MX / TR5MX Spring Kit W/ Retainers - 1971-1973 Part replaces Triumph part 57-1157We are now stocking a valve spring kit for BSA & Triumph late model unit singles by Kibblewhite. Each kit comes with springs, top retainers and bottom cups. We have kits for the B25, TR25, B44, B50 & TR5MX models You can use these high quality spring kits for racing or street use Made in the USA. Please refer to your parts catalog to ensure the best fitment Please use the drop down menu to select which valve spring set you desire sold in a kit as