Originally Posted by Roelof

I had 2 of those new JP engines for a break in. Although the sticker says ceramic bearings there aren't any, just steel. Both had a too tight pinch and could not be broken in by the oil bath (after 8 hours the pinch was at a level most normal engines do start with). I had to do some handlapping and again the oilbath to get the right fit.

I did see some re-timing work on the crankshaft but had no tools with me to meassure the timings.