Whizzing Sound Coming From Engine

[Grant1Shepherd]

Sorry for my poor description guys, I will upload a video of the bike starting up from cold and hopefully it will show what I'm talking about, if however it is the cam chain/cam chain tensioner, if the cam chain is worn do I have to replace both the cam chain and the cam chain tensioner or just the cam chain itself?


Hope that question makes sense, I will upload a video of the bike starting up tomorrow.


Thanks for all your responses so far.