Hello guys, I am just a newbie to the world or motorbike. I need help with my Kawasaki ZZR250. I just bought it second hand about 3 weeks ago. I feel that the bike cannot accelerate as quick. After I stopped on the light, I needed to swith up to 3rd gear to get to 60 kph. When I am on the 2nd gear, the rev is started to slow down on 8000. Basically on the 2nd gear, I cannot go more than 40kph. Is this normal? Is there might be a problem with the engine? Or probably need some tuning. Please help.