madmantrapper wrote:I'm not following your math. 74mm is already larger than 2.9129" so how could the maximum diameter be 2.0129"? If it is all in mm the tolerance would be .00075" and the limit .0059".
Typo when putting in the numbers to the reply (2.9129 I wrote but meant to put 2.9192)
which messed up my later math 
74mm plus 1.15 mm maximum service limit (In other words, after boring it out for oversize piston/rings) = 75.15mm = 2.95866142 inches (2.9587)
74.15 inches (limit on wear from standard 74mm bore, 0.15 limit) = 2.91929134 inches , rounded to 2.9193 so his measured largest measurement is right at the maximum limit for wear.. (he posted 2.914 to 2.919 measurements) but in any case, those 2 are at 90 degrees, so he has an out of round of .005" or 0.127 mm - which is WAY past the 0.010 mm limit (.0003") if the numbers KE4 posted are right (and not typos)
and anyhow , Where did I say 2.0129 ?? 74mm is 2.9134"
