Ruttly wrote on 03/28/16 at 19:02:49:Try leaning the bike when making turns , really look at your pics! Next Continentals , Dunlops , Metzlers , etc. When you only have 2 tires that's not the place to skimp to save a few bucks. It could be a life or death decision !
There is absolutely nothing wrong with Shinko 712 tires, other than the front wandering a bit on grooved pavement (jut like the stock IRC)
they ride smooth, they stick well, and they're a good tire
where they do lose out is wear, the 712 wears quicker than a Metzeler, but that's mostly due to the Met being thicker (it weighs more )
the 712 is the most commonly recommended tire on this site for the S40 unless you're a high mileage rider, followed by the 230 if you want longer life and slightly better ride, and I believe the 230 gets somewhat better wet traction and most of us use or have used them on the S40