Here we have up for sale a 1977-1978 CLYMER MOTORCYCLE SERVICE MANUAL  for the SUZUKI GS400 TWINS MODELS.   Must be around 150 pages and very indepth!!   Covers  Maintenance, troubleshooting & repair and covers the bike from head to toe.  If you are working on one of the machines this is the manual for you. The CLYMER MANUALS are famous for being so user friendly!!  It will have all the info needed to rebuild your bike.