I went -1/+2 on my 06 636 and Im currently running about 1K rpm per 10 mph in 6th. So at 75 MPH im turning nearly 7,500 RPM. I realize that the stock gearing was 1,000 rpm less. That doesnt sound like much of a difference but I know it is. My real question is, is it safe to take the bike on a 5 hr road trip at that high of RPM's for an extended amount of time?