120/70 tires are generally designed for 3.5 - 3.75 wide wheels. Putting it on a 3 inch wheel is going to change the contour of the tire. Also since the 120/70 is a lower profile tire you’re going to change the rake and trail geometry and the lower profile will throw the speedo of.I just noticed they make a 12/70-18 front in these. So they’re a possibility.
has anyone tried them on the 800?