Yes they make a 150CC and the reported top speed is actually 60-65 MPH (100-105 KPH)restricted. It is identical to the 50cc model in all respects except for the ccs. They changed the 2005 GTR 50 from 2 stroke to 4 in 2006 which cuts down on the speed and acceleration...I have the 2005 50cc and top speed at 40-45MPH.