Piston and cylinder clearance / measurement???

[Michael_Velling]

Hello,

maybe i dont understand this correct

I have to buy new pistons and the machineshop here in germany have to bore the cylinders correctly, but in germany no one who knows the correct clearance or diameter. Can you help?

Standard Piston Diameter = 3,8745 Inch
Piston 0,0600 Oversize from Macs = 3,9345 Inch
Right?

Cylinder bore Standard = 3,876 Inch ???
Cylinder bore for Oversize = 3,936 Inch ???

How much must the cylinder "bigger" then the piston? I found a source that tells: 0,015 Inch ???

I think that is very tight, or not?

Thanks a lot for information