CA77 Engine boring dimensions

[redlinerob]

I am having my cylinders bored out to accommodate .75mm o/s pistons and rings and I wanted to confirm that my measurements are correct to give to the machinist. Would you knowledgeable gentleman tell me what numbers you would use so I may compare them. I once let a machinist determine this on his own and I was left with a loose motor. As always, thanks guys.

[joeweir1]

What dimensions do you have?I will look and see if it is in my books.

[redlinerob]

I assume the measurement will be the piston skirt dia. (60mm) + the .75mm o/s piston for a bore of 60.75 mm. I am showing the repair limit for the piston to cyinder clearence .06mm. So I will ensure the machinist does not exceed 60.81mm. Preferably 60.75 to 60.76mm to be equivalent with the OEM quality standard! Is this right?

[joeweir1]

sorry-I do not have the info other than standard piston #'s.Loudmouse on this site is the engine rebuild man to talk to.

[fastjoe]

measure the piston near the bottom of the skirt. find the largest dimension. add .0015 in. That should be the finished bore size.
Joe