Cooling the Duke 690. getting my first ktmtwins order ready and i was thinking about getting the lower temp fan switch in case the 90 degree jersey summers dont agree with the ktm engine. but i was wondering if the actual coolant thermostat would allow extra cooling to take place. i saw one listed for a different ktm rated at 70c, or 157f. just In the pic, the OEM O2 sensor has been removed and the hole plugged with a bolt. Also, in the stock config, closed loop fueling is dependent upon the signal from the 02 sensor, after it heats up. With the PC5, the O2 is eliminated with the optimizer plug, so the PC5 module takes over fuel mapping. KTM 690 Duke R 2019. Bike Details. Bike Type. Fork Oil Fork Oil Weight SAE 5 Fork Oil Level All Balls Rear Shock Seal Kit - KTM 85SX 2003-07/SX105 2006-07 104 posts · Joined 2017. #1 · Aug 25, 2017. Hi, I'm in USA where there is no R model. I use a KTM 690 Duke for coaching students on the racetrack, and the bike is pretty good apart from the shock not being adjustable and being poor quality. The bike is surprisingly capable on the track aside from the rear shock. Rottweiler Project 790: Sharpening The Scalpel. THE KTM 790 DUKE WAS BROUGHT TO MARKET AND DUBBED “THE SCALPEL”, AND WHILE … 790 Dyno Files: Identifying Closed Loop And Developing Mapping Strategies To Either Work With It Or Around It. 0. $8.19. BikeMaster® Oil Filter Wrench. 0. $9.38 - $11.45. Royal Purple® Max-Cycle™ Synthetic High Performance Motorcycle Engine Oil. 0. $13.61. Maxima Racing Oils® Formula K2 2-Stroke Synthetic Premix Engine Oil. Sale Motorex Chain Lube Racing from $7.99 USD $21.95 USD KTM Heated Grip Kit 690 Duke/Enduro/SMC R 2013-2023 $199.99 USD Motion Pro Oil Filter Removal Tool $19.95 USD NICECNC Engine Oil Filler Cap Compatible with KTM 790 Duke 2018-2023,1290 Super Duke R GT,690 Duke 2008-2023,950 Duke 2004,890 Duke R 2020-2023,990 Super Duke R GT 3.5 out of 5 stars 6 $9.99 $ 9 . 99 stiFNr.