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.

 

Been there done that, mine was from a bad Dyno Tune. Took it to someone else and did a re-dyno tune and I was back to 40 to 42 in mpg.

Bob

 

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.

 

32mpg is about normal for me around town and back and forth to work.

On my daily commute the bike never really warms up in the cooler months.

But out on the road after it warms up my mileage gets considerably better as long as I stay out of the throttle.

 

I think a warm engine is the key, as I've tried everything to improve in-town mileage but without much success. It seems the warm-up cycle is the biggest problem, and when you're riding in the city there will usually be more of these cold-to-warm and back to cold cycles. The HD warm-up mode lasts only about 45 sec. according to Dynojet, and I have my PCV-AT to engage AT mode after 20 sec. or the engine attains 160° (front head temp.), and this happens usually within one mile. I should therefore be running lean AFR's very soon after starting, but the bike still gets relatively lousy mileage around town (36-40mpg). I think cold oil plays a part and it takes a long time for my oil temp. to reach a normal level (180° or higher).

The cam change didn't seem to make much difference, but time will tell.

 

I just got mine Dyno Tuned and I getting 28 mpg. Called the tuner it's going back. 06 SG SERT Bub 7 Duals SE Heavy Breather. My buddy has a 06 SG and he has more tq and hp and still gets better mpg then me by about 40 to 50 miles more on a tank. I need my Carb back

 

I may have to research this more. The wide open is ok, its not that often that I blast it but I am guilty of it sometimes. I really want to get my mileage up. Are these things hard to tune on your own.

 

I haven't worked with SERT but it has tables that deal with the AFR's for each cylinder. You should post something either here or the EFI forum and ask for advice from those who've worked with SERT. You should've received the software-install disk and manual, but if not I would go to where it was purchased and get them, or check with the PO if it was on the bike before you bought it.

I'm betting your tuner set the AFR's for the cruise range very rich to cool the bike down, obviously at the expense of mileage, but there is a compromise somewhere between ultimate cooling and mileage that you'll be happy with.

 

Sounds wrong, my 2540cc gets 31 mpg.

 

I only got 33 the other day on a 160 mile ride. It was 50-55 degrees. Although, look at all the weight I'm pulling with the fringe, hehe. I'm not the most conservative rider either. I love the sound of my Rineharts!