Just noticed today that while my right hand brake lever has a very smooth action right thru the stroke, the left is a trifle stiff ( very slightly juddery ) in action. Should you grease the pivot point on these levers ? This is a very new bike ( 4 mths ) and I`m sure supplier would be happy to look at it BUT if it can be adjusted or greased easily, I`d rather have a stab at it. Ta for all useful replies.