YZ450 rear sprocket fit on WR400?

Anyone know if the sprockets are interchangeable on theses bikes? I'd like to experiment with gearing changes but don't want to plop down 60 bucks for new ones. Found one local for a decent price, but it's off a YZ450. Thanks in advance.

While this isn't an exact answer I usually get my cross compatible fit questions answered by doing a look-up at http://www.yamaha-motor.com/sport/parts/home.aspx

Saves me money putting a WR rear sprocket on a YZ two stroke, and vice versa.

if its a 99 it will

I've done some comparing and it looks like they're all the same pretty much. I guess I'll just bring an old sprocket with me when I buy the new one. thanks for the responses.

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