Stay away from the Big gun exhaust for the honda 450. My friend spent over 300 for it and it rattled apart two seperate times. He had the stock pipe re-welded and put it back on. The K&N jet kit and filter really make a big difference in performance. I would say about 10-15% increase.

 

Thanks, he was thinking of the K&N power kit, but i heard the filter isn't as good, so the dealer said he could put a kit together for me with the k&n jets and a uni, twin air filter for $80 less.

His speedo says 79 which is close to yours, but i can't understand why he's getting soo poor gas milage. I turned the idle way down, but that didn't make a difference in the gas milage. Any help would be appreciated

p.s he lost a little with the bigger tires but not that much!