If you had one on your bike you wouldnt be saying that. No way in the world is the bike easier to start without the mod!.
I've had my '01 YZF since new and I've never put the decompression cam in. I just don't need it since it always starts on the 1st or 2nd kick.
I do have a cam sitting in my garage. I just haven't got around to it since it really isn't that big of an issue for me.