Progress Sunday
Removed up-pipe/muffler clamp. Muffler bracket bolt frozen, started to strip with open-end wrench. Removed muffler complete with passenger peg bracket. Stripped out most of the old (steel wire/gunk) header gasket. Reference note: inside pipe 450mm, outside diameter 550mm, so “donut” muffler gasket needs those dimensions.
Progress today
Used breaker bar (thanks again, Dan) with muffler/peg bracket in vise. Actually sheared bolt, but that got it out of the bracket, freeing the muffler.
Cleaned up stock muffler (for storage) and passenger peg bracket, for reinstall.
Rear-end minus pipe and passenger bracket
Added new Delkevic mounting bracket with longer, stainless socket bolts and dryfit assembly on the bike. Tested muffler fit. All OK so far. Will test with bodywork before final assembly.