After 18 miles of dirt riding on my DS the "fuel" gauge was at the upper edge of the 1/2 mark. So using that as an indicator I would get about 36 miles. However, my GPS shows that the speedometer and odometer on my DS are both 5.5% low. Therefore, that 18 miles would actually be 19 miles indicating a range on dirt of 38 miles. Pavement riding at 35 mph, with some stop and go, gets me about 32 miles (using the gauge at 1/2 after 16 miles as the indicator). MY test in Death Valley only got 26.1 miles riding until it shut off. However, factoring in the error it would be 28 miles. The big factor on that particular ride was the very steep 1 mile climb at the end which really sapped the remaining energy. Without that final climb I might have made the 30 to 32 miles.
It seems to me that I saw in the specs that the X, S, & DS had the same motor sprocket. However, I'm going on memory (I'm almost 76) so that would have to be checked out.
BTW - The DS is a far better dirt bike than I expected it to be. It handles very well in the soft, tight, and rocky, stuff. A pleasant surprise to me, because I always considered dual-sports to be a compromise in performance, both on road and off road. The DS exceeded my expectations in both areas.
trikester