Hi Ace, could you tell me what is the difference between "knocking" and "pinging" ?
Some people use the terms interchangeably.
However, I like to try to differentiate a "ping" from a "knock", in that pinging is combustion related, and knocking could be a mechanical issue like bearing failure.
Pinging sounds like erratic rattling with a high pitched metallic sound. almost random frequency that increases as you open the throttle. It almost never happens when decelerating. Sort of like keys rattling around on a metal plate.
Knocking, in my world, is a hard pounding sound of two metal parts hitting each other, and it will increase or decrease with accel or decel, usually. Like a hammer on an anvil. This is normally indicative of an impending parts failure.
So, that's how I view these terms, and I try to get novices to identify these sounds more conclusively in order to better guess at the cause over the internet.
Probably at the low mileage of your bike, it would not likely be a serious issue, but pinging can cause parts failures if it is not remedied.
With pinging, if you put in a tank of higher octane fuel, it will cure it. If it does, you must have the ignition timing checked, or use the better quality fuel on an every day basis.