well i think we have the answer.. i pm'd " waruta" a forum member who is in japan and ask him to kindly find the info for us.. he has just pm'd me back with this info...
Took a little bit of searching, but I believe the information you are looking for is below:
バンデット400
[GK75A]
バッテリー Battery
YTX9-BS
タペット隙間 Tappet Opening/Gap
IN0.10~0.15mm
EX0.15~0.20mm
フロントフォークオイル量 Front Fork Oil Volume
545cc
油面 Oil Level
109mm
メインジェット Main Jet
#100
スロージェット Sprocket
#32.5
プラグ Plug
CR8EK
チェーン Chain
525-114
Hope this helps.
Regards,
W.
thanks waruta for clearing the matter for us