Hi i have a single carb fitted to my 1972 bay with original oil bath filter, was looking at upgrading the carb it currently has a Bocar Mexican carb fitted is there a good straight forward replacement or shall I get the Bocar reconditioned?
A working old Bocar is likely to be better than some new EMPI versions. But what is wrong with the existing carburettor ? If your carburettor installation is modified from stock with a little air filter sitting on top, spending money on restoring the hot air feed through a stock air cleaner is more likely to give you an improvement. Suffering from audible air leaks through the spindle bushings, I did manage to glue new spindle bushings into a Bocar using those sold for Solex using a little epoxy glue to fill the gap. In the end, both Bocar and Solex were good enough to be fitted as standard on these engines.
I went looking for a mate the other day for a new German 34 Pict. Not available. Best you can get is a 30 Pict with an adapter plate. You can get OG rebuilt but not cheap https://www.wayoutwestie.com/product/solex-34-pict-3-genuine-rebuilt-german-carburettors/ If yours is a Solex then get it rebuilt
I have a standard oil bath filter so all good there it runs a bit lumpy when cold choke also seems to play around I have had the bus 11 years don’t know the history of the carb although I have tons of paperwork I have a look see if I can see when it was replaced ?
It may never have been replaced, the engine may have been built with a Solex built by Bocar in Mexico like mine, (just took a picture..) or the change was done way back. The choke issue can be that the heater capsule wiring comes loose - I had to centre punch the copper rivets on mine where the tag started waggling around. If it runs lumpy when cold, some of that is just the fact that until the hot air comes up from the cylinder head, the engine is running with cold air coming out of the carburettor, so it runs lean then rich then lean .. That takes a couple of miles for the cylinder head to get warm, then it should settle down, at about the same time as the choke is just about in the fully hot position.
