A couple of years ago, my brother had S&S 510Gs installed in his '04 Heritage which had almost 50K miles on it. The tensioner shoes were about half worn and the chains didn't flex too much. I checked the tensioners in my '04 Road King w/43k miles last summer and they didn't look too bad. My brother runs Mobil 1 and I run SYN 3. I might cheap-out on my 95" build and just install new tensioner shoes along with cams , Torrington bearings and new lifters. I plan to use the stock push rods.
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