Subject: RE: Bad Piston?/nikasil break-in

That's what I did on mine. Accelerate, drop off, accelerate, drop off,
etc. It's a real pain to ride that way for long so I only did it for
30-50 miles, then did the 'vary speed all the time' thing for awhile.
It's not a concensus but it worked for me and the compression looks just
fine.

I've read that "new" engines benefit from significant ring pressure in
the first 20 miles (I guess you get that from high load? hard
acceleration uphill?).