Hello, I have problems lately with the gearbox, when I have to climb from second to third, especially with the cold engine. Has always been a little delicate move from second to third but is now almost impossible, I have many dead spots, and I can not go up to third gear. 11600 kms bike tine. last oil change to 9600 kms. 10w 30 castrol.Someone can give me some advice or solution?