Modern Vespa

Hi hi! In the process of replacing the intake manifold, the inlet nozzle (where the oil pump tubing goes) broke off.

Maybe a long shot, but is that inlet part replaceable? I'd love to not have to buy a whole new carb. 😁

Thanks, y'all, and happy scooting! 🛵

Ouch! Im guessing youre going to have to buy a new carb. Facebook or ebay got any used carbs?

Not a part that is under much pressure so JB weld will do it. 🤔

Can you take the carb apart, enlarge clean the hole and JB-Weld part of a brass barb into the opening?

This is in the realm of what I was thinking — it would be super convenient if the nozzle was part of something removable inside the carb! I couldn't tell based on photos, but the carb parts diagrams didn't show it, so I figured I was SOL.

How would I go about removing the half of that barb that I don't need?

I don't know what i.d. that hose is. Take it into the brass fitting section of Lowe's, ACE or HD. You might even be able to use the brass insert of a plastic ice maker hose like below. Buy the fitting that accomodates the inside diameter of your hose best. Better for the hose to be a little tight, than a little loose. I'm just guessing here, but if you have to ask how to cut it to size, I imagine fitting it into the carb will be quite a challenge for you. Hacksaw, bench grinder and files. I would disassemble the carb and drill a hole into it slightly larger than your brass fitting. Clean the piss out of it with alcohol or acetone. Mix up a small amount of JB Weld. Use the 24 hour set stuff. Put a light coating on the end fitting into the carb, and insert. Shove a q-tip or something similar into the end of the fitting your putting the epoxy on to avoid plugging it with epoxy.

It's called a check valve, and none of the $2 solutions presented are particularly good. The check valve keeps oil from flowing through the system when the engine is off. If you don't replace the valve itself, gravity will make oil travel out of the oil tank, down to the pump and then back up into the carb. Day and Night, 24/7. Once it fills up the carburetor, it finds other places to go. The crankcase is a popular one, so is all over the floor. If you've ever seen a smoke grenade like they use to hide Tanks on the battlefield, imagine one of those following you around for about five miles while the excess oil in the crankcase burns off. Now imagine finding your mailbox full of CARB excess polluter notices.

If you can find a replacement that is the correct diameter and presses in, you can pull it out with a set of channel locks and press the new one in and fix it that way. Otherwise, there is a new carburetor in your future, or you can add oil to the gas instead of using the oil tank.

I've only seen one company supply them as a replaceable item for their own scooters. QJ shipped a bunch of bikes that had carburetors with bad check valves. And that's how I learned what happens when a check valve doesn't work properly, and how to replace it.

https://scooterpartsco.com/et2-air-and-fuel-c-3637_3639_3712/carburetor-for-vespa-et2-p-1386.html is the carburetor, and you likely need the cable mentioned.

Yikes! 😆

A hearty thank you to each of you for weighing in and sharing your expertise. It's helped me figure out my next step, which looks like it'll be replacing the carb. I managed to find a reasonably priced replacement Weber 12OM on eBay, less than the cost of a new Dellorto. 🫶