My $.02...
Since others have posted their opinions, I'll put mine up as well.
I've used this basic procedure as long as I can remember, and never had any engine failures or other troubles on a new vehicle.
1. FOLLOW THE RECOMMENDED LIMITATIONS FOR THE FIRST 100-150 MILES
- No full-throttle operation
- No high-RPM operation
- HEAT-CYCLES (start, warmup, ride 10-15 miles, stop, cool off, repeat)
Then, thereafter UP TO 500 MILES:
2. Gradually increase both throttle position and RPM
- FEEL the engine's response (she'll tell you if it's not okay!)
- No sustained WFO running
- Extend the heat-cycle duration
AT ~500 MILES:
3. Change oil and filter to the brand/type you'll be using in the future
- Stay with the generally regime of 'feeling' the engine response; but in general ride it the way you intend to ride it.
A related anecdote...
A friend bought two brand new bikes (this isn't recent; but the technology was very similar to the air-cooled Triumph twins today), and put them through break-in two different ways. One bike he followed the manufacturers recommendations to the letter, the other he did essentially as above. At 1000 miles (the end of the manufacturers break-in period) he ran both bikes on the same dyno at the same time. The results were pretty telling. The bike which was treated per the manufacturer's instructions was DOWN 8% in peak power, and a couple percent in peak torque. That bike also felt tight at higher RPM.
So there ya go...
As always, YMMV