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Ian_FE501

Long range tank fuel pump thingy

6 posts in this topic

Hi all, I've got this long range tank (around 25L) that has what appears to be a vacuum operated fuel pump. Don't know what brand the tank is, doesn't look like ant of the usual ones ie Acerbis , IMS , or Clarke but the lower parts are just below the carb. Anyone had any experience with these pumps as far as operation or reliability go?

Thanks Ian

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without a pic, it's kind of hard to say if anyone's had any experience with "them" or not.

I'll go out on a limb and assume what you've got is very simular (if not identical) to the vac pump on my 7 gallon tank from IMS.

Assuming that's true, you needn't worry about the pump - they're dead-nut reliable. They've been used on snowmobiles for eons, & more recently, quads for years.

If you want to "worry" about something, worry about your connections to & from the pump for vac. & fuel - The pump itself will pump "forever".

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If it is what i'm think'n.. unless you let it sit dry for a long time (1 year?) after use. They work forever.Then the diaphrams dry out and get stiff.

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The 7 gallon IMS tank comes with those pumps so that would be my guess as to which tank you have.

I just installed the IMS 4.6 gallon tank on my XR650R and have been thinking about that vacuum pump. How hard would it be to install it on my tank so I never have to lay my piggie down on her right side to get to all the fuel?

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Thanks fellas, sounds like the 7 gal IMS. The tank has one tap and three other tube outlets, you can imagine the plumbing, the previous owner obviously hadn't considered ever needing to remove the tank in the field particularly as the tube outlets aren't valved. I've got to find some in-line taps from somewhere.

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Thanks fellas, sounds like the 7 gal IMS. The tank has one tap and three other tube outlets, you can imagine the plumbing, the previous owner obviously hadn't considered ever needing to remove the tank in the field particularly as the tube outlets aren't valved. I've got to find some in-line taps from somewhere.

yeah, that sure sounds lke the IMS tank alrightly :) 2 outlets in the front wings, 1 side has to cross over the engine & tee into the other, then to the pump, & from the pump back across the engine & into the tank by the petcock - can't blame the P.O., that's the way IMS did it - Can't take the tank off without draining the tank, can't drain the tank without having fuel some amount of fuel pee on the engine :smirk:

Havn't found them yet, but a 3 small little petcocks that would thread into the tank would sure be a wonderful addition!

How hard would it be to install it on my tank so I never have to lay my piggie down on her right side to get to all the fuel?
yeah, the plumbing would be simple - just a fuel in & out and a port for a vac line. But where/how you'd mount it on the bike, hmm... on the Mongo tank, IMS cast in a couple of nutserts to mount the pump to the bottom of the tank - I imagine you could fab some little bracket or something to mount it - it's roughly a 2.5 x 3.5 x .75 rectangle

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