For all those interested, the front cover is piss easy to get off without removing wheel or guard etc. I spent a total of 2hrs to get it to this point (incl draining fluids and raditor removal) and then another half hour fiddling with clutch assembly before I got to the detent/shift mechanism. I'm competent with a socket set but by no means quick with this stuff so about 5 hrs start to finish to replace a detent spring would be about right for me. Interestingly I got an over-the-phone estimate of $1500.00 AUD to have my dealer do the job...