Assuming that poor Horex Imperator OHC Kayser 500 was restored just recently , judging from the "super cool " left side mounted number plate next to the rear hub, I feel very sorry for her. One cannot seriously discuss taste or looks but this over all "style" seems to have sprung from a 17 old biker - or so it looks . Lots of details I find executed very poorly and this is something that distinguishes well made cafe racers from a majority of only low quality finishes when looking closely.
I don´t see the point of fabricating a rear chain driven dynamo, the slower you go the more miserable the output is. In case of this Horex the not so poor dynamo would sit behind a chromed cover on the left side crankshaft taper, some 60 or 80 W 6 V . You can get a 150 W alternator 12 V today to go in there , electronic ignition included at € 500.- plus, in Japanese brushless style, so this contraption is pointless for various reasons. 55 hp from that engine are a bit wishful thinking , optimists may get them for a very short time with all racing goodies inbuilt but not in public street configuration for decent mileage. The 500 cc Kayser below is in low tune, one carb, very well mannered and my job to keep her in good health for an old pal in my town since the mid-seventies. She once had a full fairing, plastic tank and "fast seat" to go with it - you get the picture. As Albert is in his eighties by now the bike is only once or twice a year a little bit on the road, HIS health no longer so great. His old bike is no way original, he likes the sports looks, a Honda Clubman 500 seat was just perfect for the bike. He would like me to have the bike after all that time but really I´d better like to see it go to some other worthy owner, got some more Horexes already.
Vic