Join Date: Aug 2008
Location: Northern Lower Michigan
Mentioned: 0 Post(s)
I used to cruise at 3500, but at lower RPMs I notice the vibes a lot more than at the higher RPMs. And with 90% of our components being from the 650r, which is built to sustain slightly higher rpms, I would think that the wear difference wouldn't be as bad. And even riding at 3.5k, my mileage has been in the 40-45mpg range. Running at 5k seemed to slightly improve my mpg, which seems counter intuitive, until you think about it. Yes, it is doing more revolutions, but if each revolution is putting out more power, and it is not being zapped by the drivetrain, you could possibly improve your gas mileage. Kind of like how my car sweet spots at around 2.5k instead of 2k.
Of course, this is all relative to chain condition, tire type, and tire pressure.
And to clarify, I was cruising at 7k, but noted the speed at 8k. I think 7k put me at about 65mph. However, I think I may go back to cruising in the 4.5-6k range.