Hi new to group i had my 2013 gs for about 6 months and ride it every day I've done a few 500 mile trips and normally when you change gear the selector moves slighty up or down ready for next gear selection but this week the gear selector once in gear doesn't move to enable the next gear change whether up or down the gear box.i have to lift it gently with my boot if i want to change down and push down if i want to change up any advice please