Why does my 08 ktm 105 make clinking noises when riding in low RPM's -gear box maybe?

Answer 1

In answering this I would like to ask a question. Has it always made this "clinking" moise or did it just recently start. Most likely if it was something loose in the gear box you wouldn't be able to shift through the gears. Since you didn't say anything about that I'm assuming it does shift ok. First I would drain the gear oil (starting the bike up and warming the oil up before draining) and look for metal shavings in the oil. If it does not expel any metal with the oil, I would add oil back into the gear box, start it up and ride it long enough to warm it up and take note of the noise. Note the following: 1) estimate what rpm range the noise is occuring 2) note if the noise goes away at mid-full throttle 3) Does it shift into all gears 4) is it shifting smooth or does it shift notchy and try to hang up while shifting My 525 makes a little bit of a chatter when it has been lugged down and you roll the throttle on, this is normal for the 525. Not sure about the 105's though. If it persist's I would run it by your KTM dealer and have them check it out. Tell them you changed oil and if you found any metal shavings when changing it and also tell them the responses on the 4 questions above. This will give them some info on their diagnosis.