You would need to amend
bbpress\templates\default\bbpress\loop-topics.php
bbpress\templates\default\bbpress\loop-single-topic.php
so for loop topics find
wp-content/plugins/bbpress/templates/default/bbpress/loop-topics.php
transfer this to your pc and edit as required
and save
create a directory on your theme called ‘bbpress’
ie wp-content/themes/%your-theme-name%/bbpress
where %your-theme-name% is the name of your theme
Then transfer the file you saved above and put in in the directory called bbpress that you created above, so you end up with
wp-content/themes/%your-theme-name%/bbpress/loop-topics.php
bbPress will now use this template instead of the original
repeat for loop-single-topic.php
you would then need to change the style css to amend width.
Sorry beyond free help to actually do the answer, if you’d like me to do this as a paid job, then contact me via