Quote Originally Posted by AnthonyF View Post
Does anyone have a 21mm Allen? I have a 19 but it's not big enough. it's for my R6 swing arm axle pivot bearing. It's holding me back from droping the bike and removing the engine.

-Ant.
you can use a bolt head. put two nuts on the bolt and lock them together then use a socket or wrench to back it out. hope this helps