Join Date: Apr 2015
Location: Murrysville, PA, USA. A pleasant, wooded suburb of Pittsburgh.
If you don't care to change to good pads, then you likely will be keeping the stock pads for a long time - those stock pads wear like they're made of iron, and feel like it too. They require a lot more effort at the lever to stop compared to HH pads, but if improved brake performance is not a priority for you, the stockers will do the job. The corollary to the hardness of the stock pads is that they are equally slow to bed-in.
I suspect you may have fallen prey to the "contaminated rotor syndrome". Apparently, the Bajaj factory does not clean new rotors after manufacturing or assembly, sending them on to dealers and customers. If the dealer does not clean the rotors carefully before delivery to the customer (some do, many don't), then the new owner unwittingly becomes the rotor-cleaner the first few times he/she uses the brakes. The brand-new rotor's factory-supplied layer of oil/grease/crud is quickly embedded into the contact surface of the brake pads as soon as they squeeze the contaminated rotor. This makes the stock pads even more problematic and, I believe, can cause strange behavior such as odd noises as well as poor braking.
Whatever pads you use, it is essential to thoroughly clean the rotors on a new 390. If your stock pads have become contaminated but you still want to keep them, then you should take out the pads and sand off the top few (contaminated) millimeters with a flat block using ~220 grit sandpaper. Reinstall the pads and clean the rotors regularly henceforth.
EBC recommends the following bedding-in procedure for HH pads, but it should work for other pads as well: Accelerate to 50 MPH (80KPH) then, firmly applying the brake to be bedded-in, decelerate to 20 MPH (32KPH). Repeat this procedure 6 times without stopping to allow the brake to cool. Then allow the brake to cool for about 5 minutes and perform another braking cycle like this. After several iterations you should begin to feel the brake biting harder as the pad contact surface conforms more and more to the rotor surface. The stock pads, because of their hardness, will probably take longer than HH pads to bed-in.
"If you don't know where you're going, you might wind up somewhere else."
2015 390 Duke
1980 Moto Guzzi V50 II (becoming a cafe racer)
1984 Moto Guzzi SP 1000
Last edited by Diploman; 01-08-2017 at 10:51 AM.