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Discussion in 'Crazy-Awesome almost Dakar racers (950/990cc)' started by jeepman256, Oct 18, 2013.
I have one now , it's filling the front cylinder with fuel , do I go bk to an electric or what?
...or install either an electric or a manual fuel shut off valve.
If you're happy with the vacuum pump otherwise, there is no reason to change the simplest approach available.
If it only does that when sitting, then a shutoff valve should take care of you. If it's flooding while running, you probably have an issue in the carbs that needs to be addressed.
Put the bike in top gear and roll it back and pop the clutch to get the fuel out of the cylinder. I had one on my 950 (Mikuni DFS21 IIRC) and went to a beans kitted stock pump. You need to either shut the petcock off at the end of your rides or get a vacuum shutoff.
I always admired the simplicity of the vacuum pump. But I never got around to trying it on my 950. The Facet electric just worked too well....
If you remember to turn off the petcock almost every time you turn the engine off. Also the location of the pump will influence if it vapor locks or if the tanks run dry they tend to have a hard time repriming. One of the other challenges with these pumps is the pressure is all over the place. The problem with this is related to the float needles not being able to hold off much pressure greater than 3-4 PSI. Stock FP is 1.5-2 from the Mitzu pump.
The modern electronic pumps that have stop check valves in them are reliable and will keep the fuel from passing by the pump when its not energized. They also maintain fuel pressure at 1.5-2.5.
DR_Bean OEM pump upgrade. ~$60 +/- Works very well, takes some skill to install. Fits in the OEM location and doesn't require any other modification.
Facet 40171: ~$60 +/-, works very well, requires modification of mounting and plumbing, tight fit to the skid plate
Thanks for all of the advice , sounds like a new electric pump is in store for my bike, that remembering to turn the fuel off gets to be a pain in the ass !! Especially after u've had a few COLD BEERS!!