Giday Johnny ...welcome to the CBRF mate ..
The F4i is a sweet ride ....nice ....
post a pick up if you have any?
Your exhaust question will get better noticed on the 600 boards..

take care and stay safe ...

BTW : Need any help around here just PM me :-)
Some fast find links are below mate ....use them with my compliments ..

How to use all the stuff within the CBRForum
https://cbrforum.com/forum/forum-help-suggestion-center-8/

Official CBRForum Rules
https://cbrforum.com/forum/new-member-area-5/cbr-forum-official-rules-52156/

Need a Workshop manual? Grab one from one of these links :-)
http://www.members.iinet.net.au/~cbr/Honda_CBR1000F_Service_Manual.pdf
http://blackbears.ru/index_en.php?get=manual
http://www.carlsalter.com/motorcycle-manuals.asp

NOOBS...are you new to Forums .... ?
Please spend two minutes and watch these vids :-)

How to use Forums...a great for beginers to forums :-)
http://www.youtube.com/watch?v=DIyr5...eature=related

Another very good insight to how to use Forums
http://www.youtube.com/watch?v=B9q2jNjOPdk

A more radical view of Forums :-)
http://www.youtube.com/watch?v=rUJJpQzRkVE