I agree with SMR, the bike could handle it no problem, the weak link in the chain is your ass
I drive from fremont to san jose which is about 45 minutes with traffic and here is what I recommend:
1. Don’t carry anything on your back! Whenever I carry something on my back (violin/backpack/etc..) I get tired of riding about twice as fast as usual. I would recommend getting a tank bag or tail bag if you need to carry some stuff with you while riding a longer distance.
2. Speeding. Speeding is much easier to do on a bike, in fact I recommend that you do it I have heard that it is actually safer if you are always going about 5mph faster than the rest of the traffic, that way most of your obstacles and worries are to concentrated in front of you instead of behind. I tend to agree with that train of thought to a degree, sometimes the traffic here can all be cruising at 80+mph so you have to weigh the benefits of a little increased safety with a big ticket from the cops.
In the end though I would try and travel at a speed you are comfortable with, whether that be 55, 65, or 85 (and the ninja can handle all of those speeds)
~Best Beginner Motorcycles Admin