Fuel additives- lead replacement

[PatM]

Now Ive got my 400 back together Ill be off for the MOT shortly, once Ive taken it for a few crafty runs and sorted out any obvious problems. One thing occured to me- do I need to put Redex additive in (the one with the lead)?

[SteveD CB500K0]

No.
They run perfectly well on unleaded (and were designed that way in the 70's)