I currently have a 2013 cbr400r - it's pretty much the same engine as the 500, but the stroke is different.
The 400 has a slightly higher rev limit and a slightly higher compression ratio than the 500.
I chanced upon a few threads and websites that mention forged pistons for the 500 that offer a higher compression ratio for the 500s:
P.S. The part numbers for the 400's and 500's pistons and connecting rod assemblies are different, but I am unable to find specific details on what their differences are.
The 400 has a slightly higher rev limit and a slightly higher compression ratio than the 500.
I chanced upon a few threads and websites that mention forged pistons for the 500 that offer a higher compression ratio for the 500s:
- https://www.motomentum.com/j-e-pistons-piston-kit-for-honda-cbr500r-2013-2018-4604184
- Wiseco Honda CBR500R 2013-2018 Forged Piston Kit
P.S. The part numbers for the 400's and 500's pistons and connecting rod assemblies are different, but I am unable to find specific details on what their differences are.