You need to be able to get enough room to remove the lower bolts from the dog leg and lower suspension, exhaust will be in the way. While you are at removing the fixing bolts, take the opportunity to grease up the joint bearings as the lower ones can take a bit of abuse if the bike is used in wet weather.
Give all the suspension nuts a squirt of WD40 or plus gas the night before to make them easier to undo, when we changed martins shock over they were a pain to undo without spraying them first
Just slackened off the 3 bolts at the bottom of the rear shock (let wd40 sock in, as advised on here.). To reiterate, does the my (stock) exhaust have to come off? Thanks. The Great Guy.