Not for the street. I weigh 190 without gear. Now, my experience is on the road, not dirt. So I can't speak for hard core use off-road.
Hello So I see this thread is a few years old and its about to be 2019 in a few weeks, I was just wondering how is your bike with the Bill Blue 305 kit running? I've been thinking of getting one for my 2017 crf250l but I'm concerned about reliability. I read on Thumper Talk that quite a few of them fail after a few thousand km. (Both Bill Blue & Takegawa Kits). Is your bike still running well? Did you have to replace the piston rings already?