Hi Bru,

>My thoughts are to take it easy, not labouring the motor for 3-500 miles

>Other opinions believe in giving it HEAPS, and not being gentle with it

>I think the main thing is not to let it labour, just keep it spinning nice and freely.
>I was always told it is best to progressively increase the revs over 500 miles or so.

Depends on the new bore surface and ring material:-

. Old Britbikes have a relatively-coarse bore surface, for which grey iron rings are the best - modern running-in advice is "Ride It Like You Stole It", rings should be fully-sealing on bore well before 500 miles.

. Modern-bike bores should have a much smoother surface, rings made out of a material to suit; rebore done to original Honda spec., might not even need "running in"? What was original Honda advice for a new engine?

Hth.

Regards,