I don't think this is right - States really vary on the circumstances of "salvage title", which is what you are describing, so it might be true in your area. Certainly Google would bring back results like that. But this is not necessarily the case in Colorado. Export only, if not involving the original manufacturer directly, is someone avoiding taxes by claiming the vehicle will not be registered to operate in the area where it is sold. I have bought two vehicles in CO that were "farm vehicles" that got the Export stamp also. The original owners stopped driving them on state roads not long after they bought them so they did not have to keep the registration current when they sold them to their friends who also used them that way. Most of the time they never went off the ranch property anyway. Arizona is like this too, yahoo, wild wild west,...
Sure - enough of those sales are for repo's, stolen or crash totaled and in some states they get this Export stamp instead of Salvage, but in this case an old classic Ducati cosmetic damage (Bike value $5,000, new bodywork/paint $7,000) can total the bike as far as insurance people are concerned which also qualifies it for this stamp instead of Salvage if sold at auction in Colorado with no sales tax paid. In other words, DMV is satisfied there is a valid title, not lost, so it is not salvage but designate it is restricted from road use in the state without proper tax paid. This tax not paid could be as simple as a lapse in registration if you transfer the title but not get plates/registration and the previous owner had let it expire.
You can find vehicles in a junkyard with Export titles, but the operators usually don't save the paperwork for a salvage one beyond a bill of sale. Export doesn't mean to another country! Just exported out of their tax jurisdiction!
As jsheerin said above, in CA you may end up with the Hwy patrol doing a 50 state search on the VIN number for a very small fee for them to testify your bike is not stolen, they use two different systems I know of to look this up. If nothing hits, they send you back to DMV for a full and clear title like any other vehicle. You don't have to have the DMV make you go get this sign off, you can go to the Hwy Patrol facility and get their sign off yourself before you start your journey with the DMV on an "Export Only" title which helps the DMV clerk process your paperwork smoothly.