Ever wonder what a WR400 will do in the 1/4 mile? How does 13.061 @ 101.165mph sound. Not bad for a 400cc dirt bike huh? This was with a 98 WR400, YZ timed, W/B pipe, 15/46 gearing, street tire on the rear. With a knobby and a lot of spinning problems the bike was running high 13 second runs @ 95 mph. Also rode a 2000 XR650R the same day. Best run was 12.977 @ 100.514. This was on a knobby! The bike is stock except for FMF full pipe and 3 tooth smaller rear sprocket. Just thought you might like to know what your bike is capable of running.