Front tires normally have very a different cross sectional profile than a rear tire. They have an evenly rounded tread area to provide consistent feel and contact patch in a turn regardless of lean angle and a smooth turn in. As such I am wondering what kind of steering response you would get from the much flatter profile of the 130 rear on the front. Seems it would contribute to great braking when the bike is standing up but poor turning, especially on pavement. IE - from the picture the contact patch when vertical appears huge but then drops off to nothing as the bike leans.
Not sure about the 705 but most Shinko tires now come in stock sizes to fit the Versys now including 120/70-17 front. In a pinch you can use a 150/70-17 in place of the OEM 160/60-17 on the rear without issue.
Last edited by twowheels; 06-19-2017 at 02:53 PM.