Not a book but interesting none the less
http://translate.google.com/translate?hl=en&sl=ja&u=http://www.honda.co.jp/factbook/motor/&prev=/search%3Fq%3Dhonda%2Bnsr250r%2B%2Bbook%26hl%3Den%26lr%3D%26rls%3DDVXA,DVXA:2004-45,DVXA:en%26sa%3DG
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MC21R Repsol replica
SC36 'Fire storm'
RG250 MK3 GAMMA 'WALTER WOLF'
DR350SEV winter hack