2018 Yamaha SIDEWINDER B-TX LE 153 50th Service and Repair Manual

There is one 2018 Sidewinder service manual, LIT-12618-03-50, and it covers nineteen other models in the range besides the B-TX LE 153 50th. This sled's factory code is SW1NBL53JW.

Among the models sharing these pages are the B-TX SE 153 1.75, the L-TX DX, LE, LE 50th, LE 50th Early Build and SE, the M-TX 153 and 162 with their LE and SE variants, the R-TX LE 50th and SE, the S-TX DX 137 and 146, and the X-TX SE 137 and 141. That single-volume approach is normal for Yamaha where a platform is shared.

Note the Early Build entry in that list. Yamaha built some 2018 Sidewinders to a different specification part way through the year, which is exactly why the model code, not the model name, is the thing to verify before you order.