Right on cue.
Have you ever installed and used JSM Triumph lifter blocks and little Triumph lifters in a Norton?
Far as I'm concerned I got the very short straw with these. He ran out of BSA lifters last year and sent me the Triumph lifters without telling me that is what he was doing. To get BSA lifters now to replace the Triumph lifters I have to buy a complete cam kit. Tis BS all things considered.
Changes were made to the Triumph lifter blocks he still had after I showed the image to Jim. I'm not sure if he decided to fully dress out the lifters in the future, but he should if he is still going to sell them.
Hard to misalign the blocks with the tab there. All of the lifters would have made a mess if the blocks were misaligned. The other block looked the same with only 1 lifter digging in. The lifters were incredibly sharp on the edge that was responsible for the problem. I dressed the lifters out on all edges for the engine rebuild this thread is about, and put in new lifter blocks. Nutts to do so really. I should have had him radius my stock lifters. Never would have had an issue at all with the stock lifters.
Good alloy is harder than bronze, and if I'm not mistaken Triumph and BSA used iron blocks in the bikes they built with old pushrod technology. Whatever the case, if a person had to have a JSM cam and JSM lifters and lifter blocks, I'd still make sure they were the BSA lifters that have more face surface area and larger stems.
I'm surprised you didn't say I must not be using a top-rated oil in the Comnoz oil data base.
