Well after contacting Truett and Osbourne for some inf about the Ebay win pistons, turns out they are from the first batch and required a bit of clearance work for a hot motor. Not that I am going to run it as a race bike!
So off to my good friends machine shop, a few cuppa's later and we have achieved the correct clearance. Taking 10 thou off each side and use 012" thou ring gap with a bore clearance of 005"
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