Temporary Fuel Tank

[1948man]

I have rigged an old lawnmower tank as a temporary tank to sync my carbs. Since this a simple arrangement with no shutoff or need for vacuum to get the fuel to flow, I guess it compares to the permanent tank in the "Prime" position. Is there any downside to using a tank like this for a while? I guess you shouldn't get too much flow if your needle valve is working??

[chuckycheese]

No

No, you don't have to worry about the flow (as long as it's enough) but having a shut-off is kind of handy when you're using an auxiliary tank. You can probably find one at the hardware store and install it at a convenient spot on the fuel line.

[tkent02]

I have rigged an old lawnmower tank as a temporary tank to sync my carbs. Since this a simple arrangement with no shutoff or need for vacuum to get the fuel to flow, I guess it compares to the permanent tank in the "Prime" position. Is there any downside to using a tank like this for a while? I guess you shouldn't get too much flow if your needle valve is working??

As long as the tank is at about the same height as the bike's gas tank, it should work fine. If it's up too high, like hanging from the ceiling, it may push more fuel through than it should. Hang it from the handlebar, or just set it on the frame with a strap or something so it won't fall off. Aren't you going to want some sort of shut off valve?.

[Guest]

I hang a GoPed scooter tank from the garage door rails with a coat hanger.
Use hemostats for a shutoff valve.

[chuckycheese]

Ebay

I found a cheap one on Ebay several years ago and it has worked great. It has a nice shut-off valve and 'hanger' for the tank. I don't know if they're still available but the price was right.

[1948man]

Thanks for the tips. I have it secured pretty well to the frame about the same height as the regular tank. I don't have a shutoff yet but have a pair of hemostats (I guess you call one of those gizmos a "pair"). May get an in-line shutoff if I can find one handy this afternoon. I'm thinking the one in BikeCliff's syncing tutorial didn't have a shutoff.

[BassCliff]

Thanks for the tips. I have it secured pretty well to the frame about the same height as the regular tank. I don't have a shutoff yet but have a pair of hemostats (I guess you call one of those gizmos a "pair"). May get an in-line shutoff if I can find one handy this afternoon. I'm thinking the one in BikeCliff's syncing tutorial didn't have a shutoff.

Hi,

With my very simple, cheap arrangement, there is no shut-off valve. I use only a cup or two of fuel when using my temporary tank. It's never on there for very long.


Thank you for your indulgence,

BassCliff

[1948man]

I guess I wasn't flowing enough because I seemed to be dropping two cylinders. I hooked up the permanent tank and was able to check the sync but not get to the adjusters. I would hate to admit how far out of sync my bike was. It probably set some kind of record. Today, I rigged the reg tank sitting on a plywood platform perpendicular to the normal orientation far enough back so I could get to the adjusters (Bungeed everything down). I had to use a longer vacuum line.
I got it synced well and the difference is remarkable. The cam walk I assumed I had seems to have disappeared.

[bobthebiker88]

I have an old CR80 dirtbike tank I keep around to synch carbs on smaller bikes, it works nicely for me. as long as the fuel line is 1/4" or so.