Originally Posted by Mohntonite

I own a 2007 EG Standard, has tour pack, Rienhardt True Duals and a SERT. I bought it used with 4600 miles in september. now at about 6000 miles. I checked the fuel to mileage ratio and was astonished. What could they have done to the setup when adding the SERT? Could it be set up for speed over milage or is that not possible. I dont do alot of long distance riding as it is winter and all. Could it be that its just my 30 miles a day that its not getting better? Im thinking I need to get it to the dyno and readjusted.

Your thoughts please. Thanx in advance.

Originally Posted by Mohntonite

I own a 2007 EG Standard, has tour pack, Rienhardt True Duals and a SERT. I bought it used with 4600 miles in september. now at about 6000 miles. I checked the fuel to mileage ratio and was astonished. What could they have done to the setup when adding the SERT? Could it be set up for speed over milage or is that not possible. I dont do alot of long distance riding as it is winter and all. Could it be that its just my 30 miles a day that its not getting better? Im thinking I need to get it to the dyno and readjusted.

Your thoughts please. Thanx in advance.

Originally Posted by iclick

As with any advanced tuning device it's all in the tuning. Take it to a competent tuner and have the cruise-range AFR's set to around 14.5:1. This will get your mileage in line as long as you keep your wrist in control. You want to keep any throttle-position setting above about 50% to remain tuned for performance, as you're probably not in that range most of the time and you want the performance when needed. But for a majority of your riding there's no reason why you can't tune leaner to get better mileage.

Heat is a side-effect of a leaner mixture and detonation can follow from that. I would install an oil cooler if you don't already have one to get better control of engine temperatures. If engine heat is a problem after that you may need to richen the AFR's gradually until you're happy, but there's a good compromise somewhere in there for you.

I have an '07 SG with a PCV-AT, and get in the upper 40's when riding the backroads, up to 50mpg before I changed cams two weeks ago. I may have taken a minor hit in mileage with this upgrade, but not much, as yesterday I got 47mpg on one fill-up with no stop-and-go and half of which was at 65-70mph, the other half slower, 45mpg on the second that included some very heavy traffic but was otherwise ~60mph. City riding isn't as good, usually 36-40mpg. There isn't any reason why you can't do as well as I do with a good tune.

I would learn to tune SERT yourself and concentrate only on tweaking the cruise range. If you're happy with the WOT performance of the bike I would not fool with that, but you could experiment with the cruise-range settings yourself by loading the SERT software on your computer. You'll also need the necessary cables which you may need to buy if you don't already have them.

Originally Posted by Ozoneman

I recently went from about 39 miles per gallon to 33 miles per gallon after I got a re-tune when they installed new 211 cams and dresser duals on my 2006 Ultra. My tuner seems to want to maintain a AFR of about 13.5 consistently across the entire rpm range. Is this why I am only getting 33 mpg? Does this sound about right?

Originally Posted by Lonewolf176

You bet that is why. Worse than the poor mileage is the damage that can be done to your rings from lack of proper lubrication. That is why breaking an engine in "rich" to keep it cooler is such a no-no.