blaw11374 Posted March 27, 2010 I just got my self a 1998 yz400f. Can any body tell me how to change the transmission fluid? I can't find a fill hole or check hole nor window. any body. Share this post Link to post Share on other sites
grayracer513 My Ride Posted March 27, 2010 The engine oil is the trans oil. https://thumpertalk.com/forum/showthread.php?t=881284 Read also: https://thumpertalk.com/forum/showthread.php?p=5221903#post5221903 ...and download a manual: http://www.yamaha-motor-europe.com/community/service/manuals.jsp All this was in the Common Threads Sticky that you apparently bypassed. You might want to give that a look. Share this post Link to post Share on other sites
