Figuring out cylinder and piston

I have a 2000 CR125 that needs a new piston and rings. This bike has been through a lot. When new, I had Eric do the porting on the stock 125 cylinder. After quite a bit of use and piston replacements, the piston froze.

I sent it to Eric and got it bored to a 132 (I think). Ran that for a while and messed up after a rebuild and had an air leak and seized it up again.

Eric helped me out and I sent him the modded 2000 125 cylinder. He said he sent me back a 2001 cylinder. I never really checked to see if it was a 132 or back to stock, or even ported. I didn't really care since Eric really helped me out. Keep in mind this was a while ago.

Fast forward a few years. I decide to start riding the 125 again instead of the other bikes. I now want to do the top end and replace the piston, rings, etc.

Finally -- the question.

How do I know what I actually have in order to get the right parts. I don;t have a micrometer, nor do I trust my measurements if I did.

Are there marking that tell me what cylinder I have (124 or 132??) -- what year?

I looked at the piston and can't find any numbers to know what to order.

Any help is greatly appreciated.

Thanks

More Info

Cleaned the piston up and found some numbers. Can't tell what brand to reference them to though.

Piston:

C00J4
676M05400
C5


CYlinder:

A 0AU1T073

it also has a 98 above those numbers. These are the stampings on the intake side.


Any direction would be helpful

Found it. Wiseco -- std size Pro-Lite