I havnt noticed the left side run hotter. The bike just throws out a ton of heat...I do know that. Maybe it is that way with the cat still in yours? Just a guess? And someone commented they werent all that impressed with the numbers of the stock 116" with the cams and all the add-ons I have done and others have done. Indian claims a stock 126 tq (and that is from the motor, not the rear wheel - stock at the wheel was 80 hp and 102 tq.) On the dyno at the wheel...I increased over 28 ft./lbs. and 26 hp. From everything Ive seen and read...the bbk maybe puts out 97-98 hp and 120-121 tq. For the money to do a 111 to a bbk is spendy imo and alot of mods when one can get a factory setup, not tear down a motor and with cams and a dyno tune...get better numbers.