G'day Tuscan
"over the top"...... is for strength!! for loaded up touring!!
But if you un-bolted the spring to feel this weight you mention... did you also remove the rear wheel to then compare the "true swingarm assembly" weight to something else?
I can't imagine how the hollow swingarm assembly on the tenere would be "so much" heavier than something similar that would be noticeable while riding anyway.
So far haven't seen anyone do a swingarm swap yet. but i'd imagine a WR swingarm would look a bit dodgy on the tenere IMO. (if it fits)

Tuscan i most certainly don't want to sound like im raining on your parade so please forgive me if it sounds so, but why is weight an issue? I see there are a few fella's on here that are looking at spending considerable cash on fairly major mods to shed minimal weight, that are probably never going to race anyway (each to their own i know....but!). If its to make the tenere more "enduro" worhty as this maybe your main form of riding then maybe an enduro bike may have been a better choice. This is why i kept my WR when i bought my tenere, because i knew that i would never be able to push the tenere to the limits that my WR can go no matter how many mods.

Anyway mate if you go through with the swing arm swap be sure to post pics as it would be interesting to see

Cheers
Reg.

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MY CURRENT RIDE: XT660Z T�N�R�
MY OLD RIDE: well you all know who she was