im 17 and 18 pretty soon and want to take big bike test lol. But anyway my CBR can get out around 80-85 with the baffle out, yes it isn’t standard exhaust system it a Giannelli. I was thinking of changing the cog to a bigger one but that will slow my acceleration, anyway are they any other ways I can top the speed and/or the acceleration ones I changed the cog or without changing the cog?