morning men, my neighbor bought a 2005 Ultra with the 88inch motor. The bike has a power vision tuner with it,the problem is it only has a power tune loaded on it so he is getting 31-33 mpg. He would be happy if he could get closer to 40mpg if possible. the only changes from stock that I can see is a S&S hypercharger breather and slip on mufflers. I emailed Dynojet and they said to drop the fuel in the quick tune setting to -5 in the fuel cell. He gained a little mpg to about 35 riding solo. Roy at Dynojet said they realy don't have a milage tune. I bought mine from Fuel Moto and they had a good tune loaded for my RG but they won't give out maps unless you buy it from them which i understand. So just wondering if anybody out there has an idea about a milage tune for this bike without jacking the motor up. And if Jaime from FM reads this and is feeling generous that would be awesome. Never too proud to beg.lol Thanks guys, Jim

 

Approach this from a different angle. Give Dynojet the particulars, and ask them to send you a map for the specific set up of that bike (if you haven't done that already). Then run a few auto tunes. That's the beauty of the PV.....you can allow it to fine tune itself, and it's pretty darn good. If the map you have came from Dynojet set up to to be as close to the specifics of that bike, then all you have left to do is run auto tunes.

No need to beg with the PV on the bike.

 

Load the factory tune, and do a few autotune runs.

 

2005 Touring bikes are completely open loop. (no O2 sensors) so no autotune.

He can keep taking fuel out but he risks going too far.
Only take fuel out in the low and mid range.

 

Auto tune it......

 

I told Dynojet what changes i coud see, breather and mufflers, not really sure if previous owner did cams and such but they said they don't have milage tunes. forgive my ignorence about the power vision but to auto tune it do you just go into the auto tune mode and ride for a while like it will normally be riden and it will adjust the tune accordingly? About how long should you ride it 20Mi or more?

 

I thought he could still run basic autotune. It's a PV-1..... 2002 to 2013 touring.


So, he can just load the factory tune, and start from there. He said it has a "power" tune. That usually means someone lazy just dumped fuel into it. Put the factory tune back in, and see what happens to the mileage.

 

Come on folks, think!

How can you auto tune with no O2 sensors? What will the bike see? how will it adjust? 2005 bikes have no O2 sensors.
From the FAQ' on the powervision site:

What is the difference between AutoTune Basic and Pro?

AutoTune Basic: (Only works on bikes with factory O2 sensors) Uses the bike’s stock narrowband o2 sensors Works well as long as the base tune is fairly close to the bike setup Works well for completely stock or lightly modified bikes No need to drill holes and weld o2 bungs in head pipes AutoTune Pro: Uses Dynojet’s AT module and two wideband o2 sensors Works well with any base tune Works well for highly modified bikes Need to have two 18mm Dynojet o2 sensors in the exhaust

- See more at: http://www.dynojet.com/PowerVision/p...n-faqs.aspx#2a

 

If you want to improve fuel economy you need to lean out the cruise range.
Start with the DynoJet tune and start dropping the AFR's in the cruise range only. Increments of .2-.3 should be OK to start with.

Assuming the VE's are not too far off you should be able to incrementally change the AFR's and test mileage. It's going to be trial and error and will probably take some time, but without O2 sensors it's your only option.

If it gets too lean, it will start missing.

 

Dropping? that will richen it up. higher the AFR, the leaner it is.