http://www.jccpiston.com/manufacturer/16805/16805.html

The spec of the piston in the NS125 (10229) is listed here so does anyone have thier NS250 motor in bits or a piston to compare?

I'm picking up the bike I bought from ebay on saturday and the motor will probably be removed over the following week but the plan was to send it off whole to have some work done to it. So it's a toss up between just packing it off whole and have them sort and try it, or spend £23 on a piston and take a barrel off to have a look myself.

http://motorcycleproducts.co.uk/catalogue/honda-ns125-198693-piston-p-68462.html