Hi, sadly my grandad passed away and on clearing out his garage we have found and engine, with generator attached. It appears to be a Douglas engine and I remember him having this bike as well. Can't find the bike, although still tiding through his things. We have not tested the engine, but wondered how we can tell which engine it is, it appears to have 2 cylinders and if we should find it a home or sorry to swear just scrap it. At a loss so after some advice and opinions please
Steph