Reddit reviews Honda Piston Ring Set 0.75 Cb 450 Cb450 K1 - K7 13041-292-000
We found 1 Reddit comments about Honda Piston Ring Set 0.75 Cb 450 Cb450 K1 - K7 13041-292-000. Here are the top ones, ranked by their Reddit score.
I think this is the right size, the bore on a honda CB450 is 70mm:
https://www.amazon.com/Honda-Piston-Ring-0-75-Cb450/dp/B012A7IEZS/ref=sr_1_fkmrnull_1?keywords=cb450+piston+ring&qid=1556565341&s=gateway&sr=8-1-fkmrnull