Best way to lock engine to remove dynamo rotor bolt?

[GregMcN]

As the title, I need to remove dynamo rotor so was wondering what the recommended method was to lock the engine to undo the dynamo rotor bolt?
Thanks Greg

[G-Man]

Greg

Just whack the spanner and the inertia of the crank will be enough.

G

[cknight]

Also, if the stator is removed, you can use a strap wrench to hold the rotor, then loosen the bolt. Regards, Chase

[GregMcN]

Thanks G and CK.
Snapped the last strap wrench I had , must get a replacement.
Whacking it worked fine.