Takegawa introduces the first 150 class bore and stroke kit for the XR100 NSF100 CRF100 Ape100 to include forged aluminum roller rocker arms and the proven Takegawa +R Superhead. The 146cc +R Superhead bore and stroke kit offers the utmost in technology and performance. 62mm x 48.5mm bore and stroke. All aluminum ceramic plated cylinder with oil cooler ports, forged aluminum SCUT piston, 28.5/23.5mm valves, and Takegawa D-shape exhaust port. Kit comes complete with SR-30 camshaft. SR35 upgrade is available separate.