I am going thru my motor and I want to change the rings but I am not sure if the motor has ever been bored. What size would the pistons be if they are stock?

 

Stock bore is 4.360 worn a little will probably measure slightly higher of coarse.

 

Thanks very much. If I could ask one more question: Is there any advantage between the old style 3 stone hone and the ball type?

 

No, except for less broken hone shoes.

 

Personally I wouldn't use either. They are not fixed hones, meaning they don't true a cylinder at all, they only follow whats there & can do more bad than good when used in excess. Measure the bore with a good dial bore gage. Mic the piston at the correct location to determine the clearance. If a cylinder is round to within say .0015 you probably would be ok with just zipping up and down it a cupple of times with a berry hone, assuming the skirt clearance was within specs. Anymore & I'd get it bored if you intend to keep it.

 

I don't like either type of hone when used in a drill, it's almost impossible to keep the bore straight (they tend to end up like an hour glass) and IF you use moly rings do NOT use a ball hone, and most stones are way to coarse also.

Edit Mark beat me to it.

 

Assuming that a honed cylinder is required to seat rings is there anyway for a shade tree to do a decent job or is this strictly a machine shop task?

 

Without a dial bore gage & mics to see where your at it's hard to say. If there is much of a ridge on the top of the cylinders odds are it's going to need bored to make things right.