sahtt

The reason for differing 'opinions' here is very, very simple.

This is all you need to know:

S2000's have FRM cylinder walls. This is a very special situation no other motorcycle/car has that I know of off hand.

In NORMAL situations, REGARDLESS of whether it's a CAR, MOTORCYCLE, LAWNMOWER, AVIATION, or GO-Kart engine; the 'breaking in' of the engine/sealing/setting of the rings takes place within 20-50 miles depending on the type of driving you do [I realize 20 miles on lawnmower or 50 miles on a plane is odd but I'm speaking in terms of a normal automobile].

This isn't up for discussion. This is fact. ANY race team that races ANYTHING will tell you this because all combustion engines generally work in the same fashion.

**Yes there are little technicalities with that but no one cares. The rear end, gear box, etc. may also need a break in time as well as other engine components but the bottom line is engines are built to a level of accuracy these days that makes it negligable in 99.99% of cases

HOWEVER, with the s2000's special FRM cylinder walls, you need to stay out of high stress situations [high rpms] to enable THEM to seal/break in/whatever correctly. THEY take longer, 500+ miles.

The only other variables are the type of driving, oil, and how often you change the oil. The last few variables are not very controversial.