[TCIII]

So with the criticism of the Chinese Carbs I've decided to go back to the OEM. I rebuilt it a while back but wasn't getting any luck with it.

1. I tested the Peacock by taking off the line flowing into the fuel pump. Gas flows fine.
2. I can see that I'm getting gas into my carb as the fuel filter is see through. I took it off and a ton of gas came out so looks like that is flowing fine.
3. I tried to start it with the old carb, and I could not get it to run at all with our without the choke.
4. I sprayed either/starting fluid and it barley pops.


My next steps are to take the oem carb apart again and clean all the jets and ports.
I'm sure I have a vacuum leak somewhere since I don't know what the three ports are on the top. (labeled 1,2 and 3)
The previous owner just ran a hose to jump 1 and 2 and had nothing on three.

I assume one goes to the fuel tank cap? I don't have a nipple on the back of my pea cock for the others?

What would you guys do from here?

with #3 open.....that was part of the problem with too much air.

I think #1 is a vent which is just a open ended hose ran up under the shifter
#2 goes to the fuel pump
#3 goes to the petcock

FYI that filter is probably letting in TOO much air.....you need to use the original filter in the box with lid and the rest of the duct work...these bikes are real finicky on this.

 

[TCIII]

it has the ON/PRI/RES but doesn't have any nipples for another vacuum connection.

I'll make sure tomorrow but could be crazy.

The petcock with ON/PRI/RES has a vacuum line ......on the backside

 

[TCIII]

Your petcock has to have been modified by someone because fuel will not flow in the ON position without the engine running. That back plate is for the vacuum operated valve that opens the petcock when it is turning over or running.

 

[TCIII]

The vacuum to the pump has to be in a pulse sequence .

Have you tried slightly pressurizing the tank to prime the pump while turning the motor over......it helps a lot.

Also since the petcock is always ON.....you need to check your oil for gas contamination....that's what the vacuum petcock prevents.

 

[TCIII]

The bad thing about the tank on these bikes is that you have to take the engine out to take the tank off. I would just try what you said and look through the fill hole with a light and see if the tank really is dirty....if so just try the best you can to clean it with the petcock off. Be sure to clean the screens on the petcock and use a new inline filter on the fuel line to the carb.

Sounds like the idle circuit on the carb is dirty if you have to use the choke.