lately, just started maybe 50km ago, sometimes when I am coming to a stop and shifting down, the shifter won't shift down and i will be able to move it up and down all the way without it clicking into a gear, however my bike will still be in gear and if i let go of the clutch i will still be moved forward. 90% of the time it happens when I'm shifting down from 4th gear. I will shift into third and then try to shift down again, and the lever will feel loose and like it is in the "play zone" I will be stuck in second or third gear.
Any ideas why this is happening? Is it broke or is there a simple solution? Some extra info to help:
-I don't let my clutch lever out when shifting from a high gear to first gear, i'll hit it down from fourth all the way into first (i've from some people online tht this is bad, but when I asked my instructors at my motorcycle school they said it's completely fine)
-My bike is new, 2011 model
-520km on bike, problem started at around 450