There is no reason to get your insurance involved at this point -- reporting an accident that they have to cover will hike your rates.
Did you get the other driver's insurance? If so, go through them only. You can try to go through the other driver directly, but he may try to weasel out.
Take the bike to a Honda shop. Show them the damage. Get them to write you up an estimate for complete repair -- however they would do it (but I imagine it would be sourcing used parts and rebuilding, but they should have prices for stuff that is still no longer available in their records). That's what you use to take either to his insurance or to him. No need to double or triple anything -- sure, the guy's an #$%* for trying to leave, but unless you can back up the figure with a legitimate estimate from a legitimate shop, the insurance company won't take it. IF they discover you've doubled or tripled the estimate, they may file a claim for fraud against you.
The fact that it's already got a salvage title might burn you in the end, but I have no idea. The insurance company will try to lowball you, but stick to the written estimate you have. They'll probably try to total it for a lowball figure of what that model would be worth, and if so then you'll have to negotiate. And you should be able to buy it back after the settlement for pennies on the dollar as suggested.