Oh, and like others here I favour a sympathetic resto that brings the safety up to standard (I'd be losing the Bulgin mains connectors)and replaced dead caps with modern equivalents. If a collector subsequently wants to return the thing to completely original, make the work reversible so that they can refit the Bulgins and resolder leaky old paper in oil caps.
I've seen this done very well in classic cars and bikes. I saw a Lotus 7 Series 2 with a worn out engine, rebuild cost was eye watering but the restorers built an engine cradle that allowed the fitment of a modern motorcycle engine using the original engine mounts. Low cost, less weight, more power. Go on then. If anyone wants to spend £5000 on a twin cam rebuild, then it's their money and they can do that and drop it back in. I've also seen classic bikes with suicide brakes removed and a new front wheel built with a decent TLS hub brake. The bike now stops, but if you want to kill yourself in modern traffic in the pursuit of originality you can refit the original ineffective brakes in minutes by reverting to the original wheel. 2 wheelnuts and a brake cable. One on, one off.
I've seen this done very well in classic cars and bikes. I saw a Lotus 7 Series 2 with a worn out engine, rebuild cost was eye watering but the restorers built an engine cradle that allowed the fitment of a modern motorcycle engine using the original engine mounts. Low cost, less weight, more power. Go on then. If anyone wants to spend £5000 on a twin cam rebuild, then it's their money and they can do that and drop it back in. I've also seen classic bikes with suicide brakes removed and a new front wheel built with a decent TLS hub brake. The bike now stops, but if you want to kill yourself in modern traffic in the pursuit of originality you can refit the original ineffective brakes in minutes by reverting to the original wheel. 2 wheelnuts and a brake cable. One on, one off.