I'd say that a bit of smoke whilst you get it going is tolerable.
If it's smoking for ages then some kind of user error is in progress.
@ChasnotRobert 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.
I'd say that a bit of smoke whilst you get it going is tolerable.
If it's smoking for ages then some kind of user error is in progress.