Could it be worth just filing them off and seeing if I can move the bars into a position where the twist grip rotates cleanly?
Buy some new parts, they are cheap enough, and will save a ton of time.
(or find a breaker)
If the bars don't have the location holes for the switchgear file off the tabs and wrap a bit of self amalgamating rubber tape round the bars before putting the switchgear back on.
Stuff for these bikes is bread and butter to the average motorcycle parts shop. Especially things that get bent when the bike falls over.
Buy some new parts, they are cheap enough, and will save a ton of time.
(or find a breaker)
If the bars don't have the location holes for the switchgear file off the tabs and wrap a bit of self amalgamating rubber tape round the bars before putting the switchgear back on.
Stuff for these bikes is bread and butter to the average motorcycle parts shop. Especially things that get bent when the bike falls over.