Dunlop has just released a line of slick race tires for small displacement motorcycles. The all-new KR448 front and KR451 rear sizes are designed specifically to work with small displacements bikes in the 300 to 400cc range. The front 110/70R17 is available in an extra soft compound, and the rear 140/70R17 is available in both an extra soft and medium compound.

For the 2019 season, these tires will also be the Official Tires of the MotoAmerica Junior Cup Class.
https://www.roadracingworld.com/news...e-motorcycles/