I am looking at a used 2013busa with Brock alen head exhaust with power commander 5. Nice bike rides like new. I have a 03 busa and on my trip odometer I can read out MPG. I usually get about 45 mpg indication if I ride nice. When I took this bike for a test drive( about 25 miles ) the gas gauge dropped alot. I thought I would just see how its doing by checking trip odometer miles and MPG. Nope just got odometer, trip one and trip two. The question is did Suzuki eliminate that function on Gen2 or just on the 2013 model year, or did installing the power commander5 mess something up? I can't seem to find an online owners manual to save my life. Anybody have and answer I would really like to know. Thanks