This product is a service manual for the SR400/SR500. The new price of a service manual is quite high. That's understandable, as it covers everything about the SR400/SR500, from engine disassembly and assembly methods to detailed wiring diagrams, as well as precise tightening torques and appropriate amounts of lubricants. This product has some signs of use, but there are no tears or writing, and there are no problems with its use. Service manuals and parts lists are very helpful when performing maintenance♪ Please use it as a companion for your maintenance! Manufacturer: Yamaha Compatible models: SR400/SR500 Model: 1JR-251101～/1JN-216101～ Engraving: 1JR-28197-00 Published: May 1985 As this is a used book, please understand that it is non-refundable and non-returnable.