Sorry if this has been covered but we all know (Yamaha guys) that Yamaha in its infinite wisdom used the same part in several diferrent models. Very useful but hard to know which fits what. A little trick I use is Boat.nets site with this trick. Here's a conrod for a YZ125E but it tells you all the models that used it.
You can use the search line in the web page but I find this better
(One problem is it only works with superceded numbers so you need an updated parts list but there are many on line.)
http://www.boats.net/parts/detail/yamaha/Y-3R2-11651-01-00.html now simply replace the conrod number (3R2-11651-01-00), in the web address line with the part you are seeking, let's say a rear rim (94418-18245-00).
Here's a rear rim
http://www.boats.net/parts/detail/yamaha/Y-94418-18245-00.htmlI just replaced 3R2-11651-01-00 with 94418-18245-00.
Now for conrod kits, simply take the conrod part number (All yamahas are 11651) replace the 1 with a zero i.e. 11650 and viola it's the kit number.
Try it
http://www.boats.net/parts/detail/yamaha/Y-3R2-11650-01-00.htmlUnfortunately it sometimes misses a few but it's a good guide.
Hope this helps
More tricks later
Perko