Greg is correct that the C chain oiler is a moonlighting as a breather, but not by logic. It is because there is another hole in the block that is not visible, but shown in the riders handbook!
Gary,
I am not sure I understand why you want to add another breather, but I know multiple breathers are popular. I have never had any problems with any breather on a Vincent including the caps. You do have to check the holes in the caps to make sure they are not plugged up.
Unlike the C, the D has a number 70 Amal jet in the chain oiler, but also uses the standard metering screw used on the C, which is probably Amal also. The taper on the metering screw is almost always damaged, which is only important if you intend to use the oiler sometime.
I know of D oil tanks where the filler neck has cracked along its mating line to the tank. You can zip tie a rag on it and figure out if the leak is coming from the tank joint or the cap.
David
I'm thinking of getting another D-style ET24/6 and after modifying the return block, piping the disabled chain oiler to that. I say "another" because I already have one over the inlet valve on the front cylinder, connected to a hose with a one-way valve and an extension out the back past the rear axle.
Gary,
I am not sure I understand why you want to add another breather, but I know multiple breathers are popular. I have never had any problems with any breather on a Vincent including the caps. You do have to check the holes in the caps to make sure they are not plugged up.
Unlike the C, the D has a number 70 Amal jet in the chain oiler, but also uses the standard metering screw used on the C, which is probably Amal also. The taper on the metering screw is almost always damaged, which is only important if you intend to use the oiler sometime.
I know of D oil tanks where the filler neck has cracked along its mating line to the tank. You can zip tie a rag on it and figure out if the leak is coming from the tank joint or the cap.
David