Gent's,
For what it's worth; I did a lot of research on running in a new engine and here's what I found - Exact same model; different running in methodologies.
I have owned both a brand new 2005 Sprint ST 1050 and a 2006 model. The 2005 model was unfortunately "lost" when I t-boned a car that ran the red light while crossing a six lane intersection. He didn't "see" the red light - but luckily I saw him at the last minute and hit the brakes. If I didn't - I don't think I'd be here now. Oh, well.
The 2005 model was run in at the manufacturers recommended RPM / Milage plan. No exceptions. Oil and filter changed at 100 miles, then it had it's usual 600 mike service. Everything was fine and it ran really well (until the accident, that is).
I looked at other bikes (including the ZX-14) but decided to opt for the Sprint again as I commute 80 miles a day and it's by far the most comfortable bike for my height / frame (5' 11" / 170 lbs).
On picking up the new '06 Sprint, the dealer advised me to run it up to 6,000 RPM ("don't drive it like you stole it - but don't be scared to give it some juice either"). He also commented that they have less long term problems (such as oil leaks) if it's run a "little hotter".
I followed the advice and after the 600 mile service was told to take it easy for the next 400 miles but I could take it up to 8,000 RPM in spurts. I did this too.
The upshot of all this is that the second method proved itself to be the best bet. The difference was a marked improvement and increased torque.
I have a run I do some days on a fairly long and empty striaghtway but it has limited length. On the old '05 I got it up to 148 and it was pretty slow to crawl up there once past 130. The '06 just screamed past 130 and kept going to over 154 before I had to shut down - and it would have kept going if I hadn't run out of tarmac. Nuff said.
and I ain't talking KMPH.
