''Update (5:00 PM 5/24/18): I have just heard back from American Honda on my questions about maintenance intervals and horsepower. Unfortunately, I didn’t get quite the answers I was hoping for.
I’ll start with the good news. My Honda contact said they don’t have official horsepower figures yet, and often don’t publish this information anyway, but horsepower for the US version of the CRF450L will be “in the forties.” Not exactly hair-on-fire beastly, but I can live with it given the new 450L’s very reasonable weight. And besides, that probably means it’s detuned a bit in the name of reliability and longer maintenance intervals, right?
Nope, at least not the longer maintenance intervals part. According to Honda, oil / filter change and air filter service interval is just 600 miles, and valve inspection is 1,800 miles. Ouch.''
Link: www.citybike.com (klik)