Since I am new to the CBR, I am not sure if the rattley engine is normal or not. Opinions please, the bike has only done 1000Kms and is only noisy when hot. the engine oil has just been changed, (Silkolene comp 4 10w40). I tried loading the primary drive gears to test for the fault documented in the 09 and 10 models and it makes no difference. 20120424_121945.mpg - YouTube
I did this adjustment to the balance shaft gear backlash and it sounds normal now. http://1000rr.co.uk/general-1000rr-discussion/3942-2.htm