This year time of primary preliminary round of start and JMRCA all the Japanese championships of race/lace season was entered more and more. With regulation of this year item of the power source is modified largely, 5 cell batteries are used, as for sport class as for 23 turns and expert class with the motor of 19 turns, it seems that a little becomes moderate power. However with the primary preliminary round which this time was done in the Yatabe arena, 19 turns for expert class had not appeared, also both classes used 23 turns provisionally and became preliminary round. In the stock motor which is used with race/lace of the foreign country popular they are 19 turn motors, but because with regulation in the country there was no thing which is used so far, it is thought as the thing which in the future from each company it is developed & is sold. Of course, as soon as presently we to be advancing development even with ヨコモ, detailed regulation to be decided, it is the schedule which sells those which are adjusted to that.