Dad the reason I will allow the 1352cc is just as you said ....WEIGHT DIFFERENCE.....the engine and quick change will nave to weight 1075 with driver and the most stock HP is 191 as a 1000 is 189...the bigger bore does allow for more torque but kick in the lost of HP thru the driverline vs. the chain it will equal out... Thanks Bill May for going to this concept...it will add more cars and drivers...and with me remember I am a NON WING ONLY SERIES