The one in the pics with the wheel attached is the NSR job & the other is the VFR 400 R. You'd think that the 400 arm would be a bit beefier than the 250 chap but it's actually the other way around.
The arms are quite different castings as can be seen in the pics (I like the NSR one - it's chunkier & has smoother lines) but they're identical widths at the pivot & the pivot to axle centrelines are the same too.
I'm arksing $400 for either arm complete (the hubs, brakes, etc are interchangeable between both arms) with disc, caliper, sprocket carrier, wheel (18 X 4.5") & linkage.
The remaining arm will have the linkage & sprocket carrier but not the disc, caliper or wheel $100
Hub bearings feel good in both arms.
These ideally would suit a sub 600cc STREETFIGHTER (I'm looking at YOU Iceman) but Mad Mundy had a 400 arm in his Gixer 11 & apart from a couple of homemade dogbone related incidents it seemed to handle the torque OK.
I can box them up & postage-ise them if needed.
Who else reckons the Icemobile needs a single sider? [}]