The chains last forever so are very unlikely to fail. Same goes for the tensioner blades.
And welcome!
Greetings
Re: Greetings
It's not falling off, it's an upgrade opportunity.
Re: Greetings
Thanks for that, was just curious as the cct's get mentioned all the time but the chains never do,was thinking it may be like a cam belt/chain service requirement thing on a car, cheers. Curiosity satisfied lol
Re: Greetings
Oh fek how very rude of me. Thanks for the welcome too Tony. 
Re: Greetings
The chain runs in a constant oil bath out of sight of grit and contaminants so last much better than the exposed belts on cars.
It's not falling off, it's an upgrade opportunity.