a $500 Increase won't increase sales, but it will probably increase profits.
There are 2 ways to increase porfit (without considering cost cutting, efficiencies, Etc). If you sell x Bikes at x $ you can either Sell more Bikes at the same price or you can sell the same amount of bikes at a higher price.
And honestly because Ducati has a prestige factor associatted to it, $500 probably won't deter someone who wants at DUC, because if he wants a DUC and probably doesn't want anything else. Especially since the other Exotics are harder to get a hold of in America.
So the extra $500 will most likely more then make up for any loss in sales.
Look at how Harley Sustains a price premium for a motorcycle that performs worst and is less comfortable then its competitors.
Plus if the prices of everything keep going (highly related to the cost of Oil) then I sure in the next couple years you will find very few products that don't increase with their cost of manufacturing going up.