New engine's and "Running in".

I also agree with everything that's been said and on that note, here is my totally unproven, anecdotal and completely contradictory opinion...

There is a school of thought that you should put a new engine under a high amount of stress during it's first few hundred miles (when warm), with regular oil changes to achieve a better seal around the pistons.

Source: www.mototuneusa.com/break_in_secrets.htm written in some glorious HTML.

I have personally used this method myself when breaking in a Suzuki GSXR-750. It's still in my possession and runs as sweet as a nut. Not only that but I'm confident that this method has given me and extra 50BHP, made the tyres stickier and rendered me more appealing to the opposite sex. {{Citation needed}}

The good news is, you can spend the next few months agonising over the correct method.

When Ermintrude was new she spent the first 3 years and 18k with my parents. They drove everywhere steadily and at low revsand insisted on turning her off when opening gates even though she had only done a mile since a cold start. I don't think she ever saw more than about 3k ripems in the entire period. When I took her on she wouldn't rev cleanly past 3200 ripems and was a slug. It took nearly 3 months or more for her to be smooth at 6k ripems and work properly. I still get grief when I leave her running in gateways even though I have explained till I am blue that switching off a cold engine is a bad idea and that a minutes fuel is cheaper than a rebuilt motor. These little motors are tough and designed to scream assuming you maintain them without compromising.