Nothing. Only the addition of ABS.

I guess the abs pump adds a couple of kg to the weight but really you wouldn't notice the difference between two bikes (until you are in an emergency braking situation).

 

Probably the abs version weights 2/3 more kg.

 

No noticeable difference, ABS is worth it in my opinion. Especially if a new rider.

 

Only thing I noticed that makes a difference (besides the obvious benefit of not locking up your brakes...) is that with the ABS box under the seat area you are limited with aftermarket/used shocks. Where non ABS owners can cheaply throw on a fairly new GSX-R 750 shock with little modification, and ABS owner like myself cannot fit one, and had to buy an older CBR600F4 shock and have it rebuilt by a professional before installing it myself.

 

I bought a clutch cable on eBay said it was for a 2015 Honda CBR 500 R w/ abs. The cable is too long and there's no "throw". Something about I don't even know

 

None. I’ve a ‘25 CBR500R with ABS and it’s wicked quick.