My buddy has a 2001 YZF 426 the problem is that he is trying to convert it to a woods bike. It has way too much power for the woods, and the forks and shock are way to stiff. I have done a search and came up with nothing on converting a YZF to a WR, he has added flywheel weight, advanced timing, but still too much power. Has anybody done this? And what are they doing. Thanks in advance.