Lifter failure

Bewy said
Yep.

That is why you get a set of used factory lifters.......& get them re-faced to use with a new cam.

Unless you want a second failure......
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What? I never heard of this? Where does one get this done?
replicaracer43 said
In my shop I try NOT to build anything flat tappet. But when I do, I have a tobin-arp tappet grinder and I reface EVERY lifter that gets installed. I also save all the flat tappets I pull from core engines. The surface finish and radius is terrible on a bunch of the new ones right out of the box
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Oh...that's where! Sounds like you have a huge opportunity here...

I decided roller cams forever, but I worry like a **** about all my old Jap motorcycle engines (well, the 4-strokes anyways) that have shim-over-bucket systems.