I just purchased for my second bike a 2007 Royal Star Venture with 14 K miles. It looks brand new, keep in a garage its entire life and appears to be in great condition, except Poor MPG.
The first time I took the bike out on a long ride, out on the interstate the bike felt like it had no power. I filled the tank up during the interstate run. Got out on some country roads and when I revved the bike up, it had great power. I had to fill up at the end of the ride with only 105 miles on the tank. 30 mpg. Started reading some post about the plugs not getting enough power. Took my digital temperature reader and started the bike, in two minutes left rear was about 320, right rear and fronts were about 120. Ordered new plug. The front plus are a pain to change. After the change, both rear cylinders were reading 320, front is still 120. Going to try some gas treatment.
The bike does not run rough, it starts right up, no issues. Any suggestions? I have read where you can check and clean the start plug caps but I cant tell how to get in there to try that.
Thanks