If you know how much gas the tank holds and the you have 1/3 gal left, divide 210 miles by how much you used to get miles per gallon then multiple by 1/3 for miles for the reserve. Something like this using a GPS with my 9.3L tank on one of my bikes and math is a bit easier in metric ? Fuel tank = 9.3L. The KTM 690 SMC R features a 13.5 liter fuel tank which acts as a load-bearing part of the chassis, making it stiffer and gives the rider an optimal feel. Frame The trellis frame is manufactured from lightweight sections of top-quality chrome-molybdenum steel tubing of varying thicknesses. This engine is shared with the KTM 690 Enduro, 690 SMC & 690 Super Moto. Fuel economy of mid 40s mpg in normal use and up to 70 or just over on motorway/autobahn riding is pretty good. Fuel KTM 690 Duke MPG. 60 KTM 690 Dukes have provided 423 thousand miles of real world fuel economy & MPG data. Click here to view all the KTM 690 Dukes currently participating in our fuel tracking program. 2018. 55.7 Avg MPG. So I totally disagree with the other guy. His opinion is valid, but imo the 690/701 is like the evolutionary next step up from the drz. Awesome maintenance intervals, 6th gear, fuel injected, 30 more hp (I think), only an extra 20lbs, slightly larger fuel tank etc etc. Average fuel consumption. 60mpg (3.9/100km) as tested (4.5/100km claimed) Tank size. 20 litres. Max range to empty. 264m (tested) Rider aids. Riding Modes x 4, Bosch Cornering ABS, Traction control. Frame. Steel trellis. Front suspension. WP 43mm inverted 200mm travel. Front suspension. Non-adjustable. (R fully adjustable 240mm travel) Rear Here you will find all oils 4-stroke engine motorcycle KTM 690 Enduro R and others. All ranks, from the simplest motor racing oil has the most to protect the engine and providing the best possible performance from there to all users and all engines! Namely: a 4-stroke engine oil has nothing to do with oil 2 times, 2 time is consumed by the 26,392 Miles Tracked. View All 2008 KTM 690 Enduros. 2007. 44.4 Avg MPG. 1 Vehicle. 4 Fuel-ups. 460 Miles Tracked. View All 2007 KTM 690 Enduros. The most accurate KTM 690 Enduro MPG estimates based on real world results of 42 thousand miles driven in 13 KTM 690 Enduros. 9avk5.