I just bought my red CBR 250R on Wednesday. I haven't ridden since 1991, so I was a little nervous. I'm finding this bike easy to ride and very fun. It inspires confidence, although I'm not as fearless as I was in my twenties.
What rattle? Don't seem to have it. I have put 286 miles on it since I brought it last Thursday and don't have any rattle problem. I taken it from city street to freeway with speed at 80 mph. The only problem I have is oil leaking at a couple of o-ring seal. Brought it back to the dealer to check it out, the dealer order new o-ring for it to be out in.
this engines sweet spot for rpms is right at
5-5500 rpm range for efficiency.
i think ppl are associating that noise with that normal
mine runs great at all speeds/rpms
and my buttons have always worked good on the display.