Not a specific mightyboy manual, but 1985 alto - Our hatch? Which means most of the contents is relevant to the mightyboy.
Has helped me a lot.
http://cgi.ebay.com.au/GENUINE-SUZUKI-H ... dZViewItem
FS : MIGHTYBOY / HATCH SERVICE MANUAL - ebay
Whole version of the manual is already online here mate!
http://www.tamon.org/forum/viewtopic.php?t=2540
http://www.tamon.org/forum/viewtopic.php?t=2540
F8B EFI turbo - Three pots and a snail.