The XSR 155 is a customizer’s dream. The service manual is your best friend for these popular mods:
You can purchase a physical service manual from Yamaha dealerships, but the PDF version has distinct advantages for the modern garage. Yamaha Xsr 155 Service Manual Pdf
To convince you to hunt down this PDF, here are three known XSR 155 glitches that only the manual addresses correctly. The XSR 155 is a customizer’s dream
Many owners upsize the sprocket for highway cruising. The manual lists the stock specs (428 chain, 16T front / 46T rear). More importantly, it gives the exact rear wheel alignment marks measurement (not just the hash marks on the swingarm, which are often inaccurate). Use a ruler: Distance from swingarm pivot to axle must be equal on both sides to the millimeter. Many owners upsize the sprocket for highway cruising
If you are a professional mechanic, services like Cyclepedia or eManualOnline offer licensed, re-organized versions of the XSR 155 manual. These are often hyperlinked, allowing you to click "Oil Change" and jump directly to the drain plug torque spec.
Once you obtain the holy grail—the Yamaha XSR 155 Service Manual PDF—protect it.