The DB34 numbers & the new Gold Star model power to weight numbers are within 5%. The new GS has room for improvement & still remain streetable & user friendly, just like the KLR650. The KLR bone stock makes 48 HP with room to grow to near 60, no reason to assume another similar modern engine won't make similar numbers. I don't understand why everyone's hair is on fire, it's a new clean sheet design from a company that hasn't made a new machine in over 50 years, rather like the Royal Enfield Interceptor was. Let the new Gold Star live or die on it's own merit. Nobody sane is going to whittle out from the solid a carbon copy of a DB34 in AD 2022 and sell it for $7000. That user base doesn't exist any more, new riders are unwilling to make that kind of effort. It's essentially an improved GB500, we'll see how the market responds.
https://www.motorcyclespecs.co.za/model/BSA/BSA%20DBD34%20GS.htmDB34 Bore & Stroke = 85 x 88 ; HP = 42 @ 7000 RPM ;
Wet Weight: DB34 - 420 pounds, New GS - 470
Power to weight, stock:
DB34 = 42/420=0.100 HP/pound
New GS = 45/470 0.095 HP/pound
Estimated new GS weight after removal of lead exhaust, ES, support battery = 440 pounds
Estimated HP new GS after EFI re-tune = 50
50/440 = 0.113 HP/pound