Reply to thread

Did you get the Triumph lifters? If not, I would not worry about it. If you did, good luck. I have not had the two lifter types in my hands. I have only had the Triumph lifters, Triumph lifter blocks, and BSA lifter blocks in my hands. I did not measure any of them. Didn't think I'd have to.

Here's a pic I took of one of the Triumph lifters I have in a BSA lifter block. I ordered a set of BSA lifter blocks after I removed the messed up Triumph blocks because BSA lifters were what I thought I received. Litte did I know they were the Triumph lifters, and Triumph lifter blocks. Anyway it is easy to tell the Triumph lifter has a much smaller stem. The end of the follower is also wider on a BSA lifter and the followers travel up and down closer together in the center of the block, so are less likely to turn and dig into the block.

Second pic shows how much smaller the follower is on a Triumph lifter in the BSA block.