Love the '13 motor and suspension but Yamaha could at least try to lighten the bike up a little, not just mask the weight. Give me the YZ swing arm and linkage, please.
The same generation YZ swing arm and linkage is the same as the 2011-2013 WR's.
The newer generation YZ swingarm and linkage is only about 8 oz lighter. Source: I had them weighed.
I was all set to do the swap myself until we weighed them. The dirt bike mags that claim the new parts are so much lighter are wrong.
See my thread on how to drop 20+ pounds from a WR450F. Its not very hard. Stock weight is 260 dry. Mine is at about 241 dry.
FYI, that article says his bike is running a stock WR450F rear shock. I'm not sure about that, because it appears to me that the shock for the next generation swing arms is slightly longer than the current shocks. I haven't verified this yet though.
FYI, you can tell what generation the rear swing arm is by looking for the cross pin. The 2011-2014 WR450F have the previous generation arm with the cross pin going through the arm. You can see this by looking for the round covers that cover the pin. The next generation arm doesn't have the covers because the pin doesn't go through the arm.
The arms are not a total swap because I believe the axle size changed from year to year. Some fiddling with the axle retainers will probably be necessary.
Edited by MidlifeCrisisGuy, May 13, 2014 - 10:12 AM.