I know, I know, pretty much Spam, but since there are so many WR250R riders on here I thought I would post it up.
Yamaha and Klim worked on a line of clothes that were really nice. They are pretty much all gone, but the guys at Iron Pony did come up with a buyout on a Yamaha/Klim Gore-Tex shell.
These were $220, but IP has them for $90.
Really cool, just a lightweight Gore-Tex shell that folds into its own pocket.
It is meant to go in your saddlebag or pack and pull out to throw over top of your jacket when it gets really wet.
Even has the cool Gore/YKK zippers......
A serious pieces of equipment for less than half price.
Sizing is pretty accurate, perhaps a little generous. I would get one size larger than normal to wear over a chest protector or jacket.