: Essential for troubleshooting the neo-retro LED lighting system or the digital instrument cluster.
While official service manuals are often restricted to authorized dealers, community-uploaded versions are frequently found on document-sharing platforms: XSR 155 2021 Service Manual (Scribd) yamaha xsr 155 service manual pdf link
There is no official free PDF for the XSR 155 specifically, but : Essential for troubleshooting the neo-retro LED lighting