SOHC.co.uk Forums > Project Board
1967 CB450K0 Black Bomber Rebuild - By Royhall
AshimotoK0:
Great stuff Roy ! You are on the road with it at last.
What's you advice on mine? I have the V5C in my name (from a 1967 frame I had) but it states the original engine number. The cases I have for it are fairly close to the original and luckily, for some reason, all UK bombers have their engine ad frame numbers miles apart, so the cases are definitely 'age related'. When I make the V5C change for the replacement engine ..... do I act like I have swapped all of the engine parts over from the original as you described or just state that the engine has been replaced and get a 'sales receipt' for it?
There was a time when you just made a simple change of engine number but I guess from recent experiences and yours that the the DVLA have become more snaggy recently on engine changes.
royhall:
The big issue is what happened to the bike that the doner cases came from. If it was correctly scrapped or just fell off the radar then fine, but the bike may have been stolen and split for parts. If that's the case then it could be a problem.
I wasn't originally going to change the engine number until I got a V5C, but due to the original having the number missing and me suspecting that it wasn't the original engine I thought I would come clean and change it now. My original may have been taken and already used in another bike causing the DVLA computer to flag up a problem. Does that make sense.
I would go with the replacement engine receipt if one is available. But wait until the bike is built as it may cause an inspection request. It's a bloody minefield these days, mainly due to the huge number of vehicles being stolen and ringed or split for parts (thank eBay for that).
AshimotoK0:
Good advice Roy ... All of my CB450 Bomber stuff came from the same source and I suspect had been owned by the PO for well over 30 years untouched and probably off the DVLA radar now (but you never know). I do have two, additional, spare UK frames as well as my own bike one that could well match the several sets of spare crankcases I have but unfortunately I have no paperwork for them. Julie recently and kindly put me onto a guy on FB who runs a service where you give a frame number and they check for a registration (you pay a fiver if they identify it, nothing if they don't). I bounced my two spare frame no's off him but both came back as unidentified.
royhall:
Just for the sake of completeness. I had a charging issue with the bike that was covered in another thread. http://www.sohc.co.uk/index.php/topic,25561.0.html. The bike is now complete and legal for the road. Just in time for summer if it ever happens. And with perfect timing my V5C has just dropped through the door with the change to 'Historic Vehicle'. When I get chance I will do a little video of the bike running.
royhall:
Just a little update. The Bomber hasn't seen much use since it was completed. This is mainly due to it running rich and fouling the plugs with sooty black deposits. Strangely though it runs very well. Just changed the oil as it's been in a while and it smells badly of petrol and poured out like water. Probably unburnt fuel washing the bores and getting past the rings. As you may know from earlier in the thread I am running 500T carbs with 450 jets and needles. These carbs don't have adjustable needle positions or I would have dropped the needles a notch or two. Not sure what to do here, maybe a Mikuni conversion kit, anyone know anything about that. Obviously I can't use it with oil contamination like that. Don't seem to be having much luck with carbs lately.
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