Those near on 40 year old cases came up so well because Mrs Govig is very good with the wet and dry. Starts with 400 or 360 then 600 to 800 before handing to me to polish. The non polished castings have been blasted with very fine grit and then ultrasonically cleaned to make sure no grit is lurking anywhere where it can do damage. Just to show we don't just polish but get technical as well, he is a pic showing setting of the valve timing. If you've got a T150/160 motor in bits, remember that the timing dots on the pinions are an initial set up only and can be varied by 1/3 tooth increments either way to get them spot on. Unfortunately many bikes were assembled like this in the 70s and have never been checked and it's probably the reason some triples really go and others just go. I had to advance both the exhaust and inlet cams to get the required valve lift at tdc. Thanks for you kind works about the workshop. It's conveniently situated a few minutes walk from the TT course.