The Cyclepedia Press LLC, Yamaha YZ250 (2 Stroke) online service manual features detailed full-color photographs and wiring diagrams, complete specifications with step-by-step procedures performed and written by a veteran Yamaha dealer trained technician.. I bought a basket case 2001 YZ and it came with 2 engines out of the frame. I'm trying to figure out what's what. I figured out the bottom ends one is a 2001 and the other is 2000. Can i tell by the casting # on the cyl. and head? One head is (4JY)---Y-2 the other is (5MV)---G-1. I only have one cyl. and it is (5HD00)---Y-2 It also has some stamped #s near the power valve but cant make them.
Yamaha YZ125 for factory, Chilton & Haynes service repair manuals. Yamaha YZ125 repair manual PDF. The 2006 Yamaha YZ 125 and all other motorcycles made 1894-2025. Specifications. Pictures. Rating. Discussions.