Timing Chain Adjuster

Ive got a R1- 03 model , i suspect after checking the timing chain the adjuster is not doing its job automatic ,

The chain has lots of play in it , ive stripped off plastic's , tank and air box to try and get to the adjuster,

It seems to be stuck right behind the chassis where i cant get to it ....i think dropping the engine out is a bit beyond me , any idea's ....anyone had to change one of these adjusters before

One miserable bikeless babe !! lol