Already outdoing the competition with the R-Stage kits wasn't enough for Takegawa. The +R Superhead line of bore kits increased the performance gap by providing even larger ports, massive 28.5mm/23.5mm valves, choice of 6 camshaft profiles and 6 more in decomp design, titanium retainers, and the first in the mini world forged aluminum roller rockers to further lighten valve train. The +R Superhead is still the best selling race head in the pit bike world. Bore and stroke kits available from 88cc through 148cc, in single and Twin Spark design.