Hello Onur, Welcome! The Manual prescribes 15W-50 fully synthetic oil because the 390 engine is high output and runs hot. The recommended brand is Motorex 4T. However, any good quality fully synthetic oil from a major company will work. Silkolene, Amsoil, Mobil 1, Shell Rotella, Motul, Valvolene and others have been used successfully.
Oddometer: 197. Location: PNW. Hey Advrider, I am chronicling the rebuild of my 2007 690 SM LC4 engine here. Bike has 12k miles. It had a bad noise in the bottom that I suspected was the balancer bearing or maybe a crank bearing. Here is a video of the sound.
Changing the fork oil is covered on pg. 21. Once the old oil is drained, each fork leg requires 450 ml of new fork oil. The manual calls for SAE 4 weight oil. If you pour in the specified quantity of fork oil, the correct oil level will be achieved automatically. The manual says you may have to pump the forks several times in order to
This must be a year issue, so let's be a little bit more detail oriented in answering (and asking I guess) questions. The cover of my 2018 690 Duke says to use DOT 4 or 5.1 only; Pg 109 of the manual, "Checking/correcting the fluid level of the hydraulic clutch" reads, in part: Warning skin irritation Brake fluid causes skin irritation; blah blah brake fluid; more blah, brake fluid; etc etc

It’s not a cable, it’s a line filled with brake fluid. Check for leaks, check the line for damage and check the reservoir by the clutch lever for damage/if it’s filled up. Air in the line would cause it not to work properly. Brake fluid eats through stuff so stop the leak right away if there is one.

Jul 30, 2008. Oddometer: 8. Location: Cape Town, South Africa. Hosebag said: Manual says 1.7 litres. 1.7 for an oil change & 1.8 total or if you do a strip down of the engine. #7. yM2C.
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    • ktm 690 duke oil change