Sorry, Larry. I just re-read your first post and realized you've replaced the rings and had the cylinder honed, so WD-40 shouldn't make much difference. I was giving you advice for a piston and rings that have been sitting for a long time.
How much did you have the cylinder honed? Did you get oversized rings (I'm not sure if they exist)? You may have to go with an oversized piston to match the bore.
With a Honda engine, you can just take the piston and cylinder to the dealer and have them check 'em out, but I'm not sure about Motobecane... Seems like any motorcycle shop SHOULD be able to check it out for you, but I don't know fer shure...