CF Moto V5 By Gort (Read 6,204 times)

[Gort]

I picked this up dirt from a friend who eeded the money. This is a motorcycle but my friend told me that it's scooter under the body. I don't know how to post pictures but I found this on Google image.

That picture is definately my motorcycle. I think my friend is right because it doesn't have a clutch and you don't shift gears. So if it has scooter parts I thought you guys could help. The problem is that no gas is getting to the carb. I know because I pulled the hose off and cranked the motor. No gas came out so I think the fuel pump is broke. There's a siver disc on the fuel tank and I guess that's the pump? I could use some advice here because I don't want to brake something and have to spend more money.

[Alleyoop]

Where does the fuel line come out of the tank? bottom near the seat I would imagine. If so follow that fuel hose and it should run into a fuel pump or a a SHUT OFF Valve. SOme just have a shutoff valve and you have to turn the handle to get gas. Also check if you see any VACUUM hose from the intake manifold going to someplace that will also maybe lead you to a PETCOCK or Fuel Vacuum Pump.

Nice ride, just twist and go it has the 244cc vertical motor on it here is the user manual you can dowload for free.
www.cfmoto-us.com/download/

Alleyoop

[kz1000st]

Isn't this bike a gravity feed with a vacuum petcock like any bike? It would seem to me if you're not getting gas out of the fuel line while cranking, the petcock isn't getting vacuum to open it or the petcock is clogged.

[go4it]

Feb 2, 2013 18:28:56 GMT -6 kz1000st said:

Isn't this bike a gravity feed with a vacuum petcock like any bike? It would seem to me if you're not getting gas out of the fuel line while cranking, the petcock isn't getting vacuum to open it or the petcock is clogged.

Yes it's a gravity feed from the overhead tank and there's no fuel pump. Never really looked at my V5 so not sure if there is even a vacuum valve or not.

Bob

[Gort]

Thanks for the replies and link guys they helped. I found a diagram of my tank on a parts warehouse site. It isn't a fuel pump under the tank so it must be the gravity feed.

12 is listed as a petcock and 2 is a vacuum line. So It looks like the vacuum line opens the petcock and gravity does the rest. I ran into a couple forums where they said the vacuum petcock was lame. They said it was better to replace it with a manual valve like on a motorcycle. What do you guys think and where would I get one?

[go4it]

There's no way I would replace the vac valve with a manual on/off valve. First off are you even sure this is the real problem? It could be but it could also be several other things like leaking vacuum or clogged filter. Beside, wouldn't it be problematic for you to have a manual valve? Where would you mount it so it wouldn't be damaged and you could get to it when you need to without removing covers? Before my retirement I ran a large engineering group. One thing I learned is don't over engineer or even re-engineer something that normally works well. And the vac valve works fine under most situations. I'll bet you would forget to turn off a manual valve 60% of the time anyway. Bottom line is if the valve is bad just replace it but first be sure the valve is the problem. You can pickup a lot of used parts off of EBay if you want a cheaper way out.

Bob

[jct842]

Motorcycles do not have a manual petcock today and have not had for probably 40 years. In case of an accident or other emergency when the engine quits the gas flow quits.

[Alleyoop]

Yep it is a PETCOCK #12 the kind that screws onto the bottom of the tank. It is a Vacuum Operated Valve.
Alleyoop

[go4it]

Feb 5, 2013 13:31:26 GMT -6 jct842 said:

Motorcycles do not have a manual petcock today and have not had for probably 40 years. In case of an accident or other emergency when the engine quits the gas flow quits.

After riding most of my life I crashed a bike in 2011 and thought it might be time to actually get a cycle license. So I took a state opperated (Illinois) motorcycle course consisting of both classroom and live riding. The state provided all the bikes which veried in brand and model. But all were under 250cc. There was only 8 of us in the class but they had 15 to 20 bike available. Everyone of the bikes had a manual on/off fuel valve. Remembering to turn it off/on as needed was a part of the final test for getting your license. In fact the valve was actually a 3 way valve on/off/reserve. I can't tell you the age of these bikes but they didn't look more then a few years old. The bike I tested on was a small Yamaha.

Bottom line I know manual valves are still in use on small bore bikes. However, I would agree that larger bikes are likely not using a manual valve anymore.

Bob