I'm looking for some opinons on air fuel ratios. I'm now running a Thundermax Auto Tuner and I really like the way the bike runs, but I'm looking for that perfect ballance of power and Economy if you know what I mean. With the thundermax auto tuner it's very easy to adjust the target ratios but it's a little time consuming to do it right. there are 32 throttle positon point for every 256 rpm's from 0 to 8000 rpm's the map I loaded had the afr set to 13.8:1 in the cruizing rpms up to about 1/4 throttle. after that the ratio's start heading to 12.9:1. With those setting the bike seems to run good..........110 mph:rider but even at 70 mph I only get about 31-32 mph. Yesterday I moved my cruizing rpm afr to 14.2:1 to see if it makes a difference. I'm still running my running my lower rpms a little richer to make the bike run a little cool when Idling. So far it seems to be running the same, if not may be a little better better but I haven't got to check the milage yet.