I thought I'd try a cheater bar before spending more money on tools. Home Depot has 6' fencing poles, that seemed like overkill. Autozone had a 24" breaker bar--I realized I was using an 18" one, so I bought it for $32. Got home all excited...nada. I couldn't get the bolt to budge not even a smidjet. Talked a long while with my mechanic brother and he really thought a longer bar would work, just what to use?
I seached again and found comments on Reddit and a guy suggested try using the handle from a lift. I knew right away my mc lift did, indeed, have a removeable handle and I practically ran out to the garage.
Handle off (lift is supporting my DR650)
Oh yeah, I think this just might work
Removed sandles, on with the mc boots for better stability
And right away, I got a squaaak noise I hadn't heard yet; tried again and got some movement! But I realized the bolt was spinning, so I placed the 12" breaker bar flat against the swing arm and as I pulled on the cheater bar, that made the 12" bar snug up tight...and the darn nut finally started to loosen, very reluctantly.
At last...
...nut off, bolt removed, I can proceed to lubricating bearings and bolt. Then a few more linkage bearings to check and on with the new Cogent fancy-smancy shock.
So no new chordless impact for me...for the moment.