The end of my exhaust is missing, would this have a negative effect on the performance/fuel efficiency of my GP200. It was like this when I got the scoot so not sure if it is running normal or abnormal. Seems to run fine.

I am thinking of attaching something suitable, as similar as possible in length and cylinder diameter as original - is it worth doing this? Would it be good or bad for performance/fuel efficiency etc??
Attached shows the highlighted in red area is missing.

Cheers