Today I rode about 50 miles after installing Shinko 705 front tire.
I bought it for 2 reasons:
I always buy Shinko tires
It was the cheapest tire of my size. ($63 shipped)
I usually buy Shinko 712, but they don't make them 130/80/17 front

Somehow I missed that it was dual sport tire. (BTW, speed rating is 130 mph)
I felt some vibration in the beginning of my ride, then it decreased or almost disappeared. Maybe I just stopped paying attention to it.

http://www.shinkotireusa.com/tires

http://www.shinkotireusa.com/tire/705-series

 

I have dual sport tires on the dual sport. They wobble more at speed. They should say on the site if they are 50/50 dirt and street. They might be 10/90 or 20/80. Being 20/80 as dirt/street.

 

are yours OK for 70 mph?

 

I've had that little 250 up to around 84 mph counting the speedo off variable percentage etc. They might wobble depending on the tire. If you picked up a d606 id be worried but the shinkos should be like a 20/80 dirt to street.