Hey i am a big racer down in cali and the cr85r is a very fast bike my lil bro has one and it keeps up with my friends 450 yamaha atv but i say stock it reaches speeds up to about 75 miles per hour and this bike is very reliable its been in alot of magazines because of how it smokes all of the different companys in speed and reliability. In a race recently the yz85 couldnt stay up with it at all well email me back if you have any questions.