I have a k7 600 and it feels like 1st and 2nd gear lags a little. When I take off from stand still it seems like I could be getting a whole lot more. Is it the sprockets? The previous owner changed them. I have yet to see how many teeth. Plus I dont know if the front sprocket has been changed. I will find out more and post it. What is the best number of teeth for my bike to perform better? Or is there any other mods I could do?