Another question. Is there any benefit in taking off the group head and cleaning it
Yep. Give it a good clean. It cannot hurt. Easy peasy too. Just unscrew and scrub/wipe.
@deleted started
London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
This site is supported almost exclusively by donations. Please consider donating a small amount regularly.
Yep. Give it a good clean. It cannot hurt. Easy peasy too. Just unscrew and scrub/wipe.