'06 StreetGlide - When it was an 88" I added Ness BS, Rinehart TD's, and a PCIII. Bike ran much better but mileage suffered. Had it dyno-tuned and the mileage came right back up to 38-48 mpg combined. After the 95" mods (and dyno-tune) I've gotten as high as 51 mpg and average between 40-50 mpg combined.

 

My mileage varies from 35-38 with the same type of driving, much of it has to do with gas in the midwest for mine; all Missouri, Iowa, Kansas fuel gasoline has a percentage ethanol blended in, this cuts the available energy and detracts from economy. Some stations in Illinois do not get blended gas and have no ethanol, from a few times I have fueled there I have gotten 40-42mpg. The Illinois prices are frightful but the gas is better and I have heard Indiana is the same.

I still do not see adding 10-15% ethanol when you lose the same average percentage of mileage leading to the same amount of gasoline being used per mile with or without ethanol so we are saving nothing, just burning more fuel.

 

surprisingly got 50 on my weekend ride 09 stock rg
previous bike carbed rk mid 40's

 

96 cu in, stage 1 and rienharts true duals...I consistently get between 42-45 mpg this includes a mix of freeway as well as backroads

 

I just installed my Jackpot dyno tuned mufflers and Thundermax autotune and a Screamin Eagle heavy breather. The bike runs great...way more power and pulls hard. I will check the fuel mileage now and see how much it dropped from stock...if any.

 

42 here before PCV. About 35 after. I'd say if your getting much better than 42 mpg your bike is running dangerously lean. I would be very uncomfortable getting 50 mpg out of a tourer. More isn't always better with these things.

 

I highly recommend some dyno time for you.
(and stay away from sharp objects).

 

38-42.

 

My bike has consistently averaged 32 mpg since doing a stage 1. My riding is about half city and half highway and I am not an overly agressive rider. The service tech says that's normal but I say BULL$HIT!!! Losing 10 mpg with just a stage 1 seems like a bit much. How soon will the spark plugs show if it's running rich?

 

Just today riding in the North Georgia mountains, we got a miraculous 42.6!!! And I was 2UP!!! The only thing I can think is that we were leaner being up higher; my ears did pop a couple times. Best I've gotten was 42 when solo on back roads. She ran like a swiss watch, didn't act lean at all.