Ya I agree. I´ve had mine only 2 weeks, and already want to change the sprocket ratio to accomodate more speed. The front is already at 15 tooth, and there is no room to increase that. Thus I have went to change the rear. the stock is 42tooth, and I wanna try 36 teeth. The problem is I couldn´t find any for that bike, so I baught a 520 blank with 36 teeth and will have it machined. This should help for highway driving, though first may end up being a little fast. I let you know the results when it´s done.