having a bit of a tidy up i just came across some notes i made when i stripped the only and only ST170 ive ever had in bits, thought they might be useful to someone
At TDC pistons were 0.025" down the bores
Piston bowl 7cc
used head gasket thickness 1.1mm
head gasket bore 86.5mm
head gasket volume 6.46cc
unskimmed head volume 43cc
stroke 88mm
bore 84.8mm
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