Replacing an FSA chainring I would like to replace my chainring for a bigger one.

I looked up my bike specs and it comes with a FSA CK-316BT, KSS, 42T chainring. I couldn't find any information about this, so I don't know how to buy a bigger chainring.

Here is a picture of what I am trying to replace, I am trying to replace only the chainring and not the whole chainset.



My question is, what type of chainring can I use to replace my current one?
The main limiting factor is chainstay clearance.  If your chainrings touch the chainstay it will wear and weaken and eventually fail.  So the first thing is google your bike frame and see what maximum size chainring its rated for.  Do this first.

Once you have that info, get onto Sheldon's gear calculator https://www.sheldonbrown.com/gear-calc.html  and play about with the numbers.    Will changing from 42 tooth to your maximum tooth give enough difference to notice?

Finally, print this PDF https://cdn.shopify.com/s/files/1/0230/9291/files/BCD_finder_tool_v2.pdf in 1:1 scaling, then put your chainring directly on it and see which BCD matches.
Note that 102 and 104 are very close as are 94 and 96.

Armed with those numbers then you can go shopping.  Make sure you fit a new chain (it needs more links anyway) and a new cassette.