If I'm out riding hard and using all the torque frequently the light comes on at around 125-130 miles...it would run out of gas completely by 150 miles or so.
If I'm riding over the road and cruising at a constant speed the light comes on at about 150 miles...it would probably run out at around 180 miles maybe?
I prefer not to ride with the "shit, I'm I gonna wind up walking or pushing" feeling so I usually have my next fuel stop in mind prior to the light coming on. The 109-R has a fuel gauge but I judge fuel level by the trip-meter for the most part.
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