ignition stick coil triumph speed triple 1050 2005 2014 Kawasaki Z1 It replaces 21121 1027 21121 1028 It replaces 21121 1027 21121 1028 This set of head stock bearings are taper roller style and have been manufactured to replace the original set of steering bearings on a ST1100 for the years and models shown above If you're having spark issues (weak or no spark) with your Triumph Speed Triple 1050 then the ignition coil coils could be the culprit and it may be worthwhile changing your ignition coils for brand new high quality replacements This ignition coil has been manufactured to replace the original stick coil on a Triumph Speed Triple 1050