Picture of the concept DH 2.0 from Derbi. It's got a 100cc motor that can be removed leaving a downhill mountainbike chassis for when the motor is not needed.
its a peice of garbage, your not going to get a downhill bike with an engine, it would just become a dirt bike. this one is a wimpy dirtbike with a fancy frame and mountain bike suspension.
soft material...and many are stuck....i owned 2008 888..its like crap..http://www.pinkbike.com/photo/1991086/ www.pinkbike.com/photo/1739759 and y got more...