The manual specifies chain slack should be (1.2-1.6 inches) of play. It also provides the swingarm alignment marks—something most casual riders ignore.
: Exact values for every bolt to ensure safety and prevent part failure. yamaha xsr 155 service manual pdf link
: Offers various user-uploaded documents, including an XSR 155 Owner's Manual and technical specification overviews. The manual specifies chain slack should be (1
If you cannot find a PDF download, several sites host the manual as a flipbook which you can view in your browser. yamaha xsr 155 service manual pdf link