If you want an XV920RH tank complete with the keys for the locking gas cap and the petcock still installed, you're welcome to mine - free, if you pick it up but you'll have to pay for me to ship to you.
I'm using a (hugely modified) Ducati Hailwood NCR tank and solo seat, so the tank is yours. It'll need a good flush and maybe a reseal (looks like some yobbo tried to use something inside the tank but maybe it's just seriously deranged overspray from a paint job gone REAL BAD) but wasn't leaking when I last used it Has some bondo spots, needs a paint job but tons more cafe-style than what you've got.
I really like your subframe. My first kick at the can used the original high strength bolts at the rear of the frame like yours does, but because of the Duke tank hugs my frame backbone so closely I couldn't use the forward mount like you've done, I installed 3, 1/4- 20 nutserts in the frame on either side and bolted the forward subframe to them. I also ran 2 tubes from the subframe horizontal tubes to the frame bolts just above the swingarm to triangulate the whole thing. Worked great, stiff as hell, was about 10% of the weight of the old subframe, but I managed to bend it (long story).
My new design will have the rear loop vertical and the Duke seat will attach at the back with 2 stainless steel allanhead bolts into nutserts installed in the subframe tubes. Still not as simple a frame as yours, but it'll get the job done.
One cautionary note about the early Virago frames; inspect the 2 coupling bolts that marry up the lower and upper frames for corrosion. If you find any, get new bolts or better yet, get aircraft-grade 3/8 bolts the correct length with either castellated nuts or locknuts. On my frame, the bolts were a light driving fit - I smeared them with white assembly grease but any thick grease should work just as well and acts like a corrosion barrier too. Torque them to factory specs (my original bolts weren't). The guys that race(d) the XV920RH's say the 3/8 bolts make a big improvement in handling.
Let me know if you want the XV tank and if you're interested in the aircraft bolts, I'll give you the correct P/N's - they cost me about $20.00 CDN for everything from Aircraft Spruce. They're at Brantford (ON) Airport and I highly recommend them. Also 2 outlets in the US and a thriving mail order biz if you live in East Nowhere, Idaho...
Regards,
Pat Cowan,
Pacomotorstuff,
pacomotorstuff@cogeco.ca
905-383-5510