i know im being a bit anal with this post, but thats how i am.
So I measured the crank journal diameters and engine bores
The stamping on the crank states the main journals were originally ground as grade 1 (54.968-54.974)
I measured them as 54.930 so ive lost about 40um due to wear.
The stamping also states the big end journals were originally ground to grade 1 (47.962-47.968),
I measured them as 47.93 so ive lost about 25um from wear.
So they've gone out of spec, but not much. Regrinding to fit 250um undersize shells feels excessive for the sake of 50um wear.
can you buy custom shells at 50um and 25um undersize? I know the answer but just want it confirmed.
Also same goes for bores,
I measured them as dia 86.12 on average
So should i just rebuild with new standard shells and accept the extra clearance (cheapest option)
Or regrind and rebore, fit new pistons with perfect clearance (expensive option)