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OK, so I have read a few fuel related posts on this page and I know the poster doesn't get treated well, but here it goes.
I rode home from work a week ago from last Friday. I completed my normal routine of filling up at the gas station and then came home and parked the bike for about 10 days as I went on vacation with the family. I started the bike this morning and noticed that I was down about 1/8 of the tank. I rode my normal 103 miles to work and back, filled up again and tracked my numbers (103 miles traveled since last fill up, 3.4 gallons, 30 mpg). I usually average about 38 mpg with 2.5 gallons.
When I got home I checked the garage for signs of fuel on the floor or a break in and found nothing. Has anyone experienced this issue? Which hose, leaking port should I check first. I don't notice any abnormal smell of gas.
Did you top it off? I notice that if I don't click several times, and rock the bike, it appears full through the cap. I can get another 1/2 - 3/4 gal in if i keep trying. (Seems better than my 2010 SG was,, not sure if they improved the vent system or not...)
Both my Sportster and Road King do the same if they sit for extended length of time. Always down a couple miles to the gallon. I just blame it on evaporation.
I know when i parked my bike for the winter it sat for a few months, then id take it on a ride, then it would sit for a few more, then id take it on a ride. I did this all winter and noticed in the end that i had to fill up again way sooner than normal, which meant there was alot of gas evaporation.
Last edited by saltlick; Apr 26, 2017 at 05:40 PM.
I do notice an increase in MPG depending on who's gas I use. I seam to get better milage with BP.
They do up the Ethanol % in the winter. Maybe that evaporated?
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