MicroSquirt.com read only forum (Jan.15,2018)

in my ongoing quest to find a suitable motorcycle pump...
i have tried to fit a intank pump....too hard
i have burnt out 2 pumps already...
i want an external pump that draws about 5 amps....i see that the bmw bikes used a bosch 070 pump.
any thoughts on this

One guy is using a "Honda VFR800 pump delivering 7gph @ 3bar and at 2.7Amps." I don't know if it's inline or intank. There is a thread on Msefi also.
Ian.

it looks like its a intank pump..
the r1 pump i got goes in to my tank...but i cant get the electrical connections to seal safely

For the electrical connection to my in-tank pump I went to the local auto parts store and bought an assortment of rubber grommets. I then took the smallest one of those and drilled a hole in the fuel level sensor plate that was a bit smaller than its thinner diameter. I covered this grommet with gasoline-resistant Permatex gasket material and used it to seal where the 12V wire goes through to the pump. The wire I clipped to the tank using the same tabs that secure the fuel level sensor wires.

This has worked fine, as far as I can tell.

i have come up with an idea.
mount the R1 pump in a housing, it needs to be bigger than the pump. to allow fuel to flow around it. that way i can mount a cheap pump that draws about 2 amps and comes from a 200 hp bike.
watch this space...

The Victory V92 pump is an external inline FI pump. It should not draw more than 3 to 4amps max. They are on Ebay from time to time. This is the only external inline pump I have found that will draw less than 5amps and not flow enough fuel for 500hp.

Hi All,

Yup, I am the Honda VFR 800 fuel pump champion - and it is still working delivering into the original Honda VFR 800 pressure regulator (3 bar) and running dry - i.e. not submerged in fuel. It runs nice and cool and powers my non-stretched application very happily (my maximum fuel consumption through the engine is about 2 gals per hour!) - it has also run for over 3 hours continuously without being switched off!(for your ifo I am also using the 220ml/min Keihin Injectors from the VFR 800!)

I have't modified the pump at all apart from the manufacture of a suction side inlet cap in freecutting stainless steel. This is designed to be a snug fit over the inlet side of the pump body with an 8mm inlet pipe spigot on the end. The cap overlaps the steel of the pump body by about half an inch and was then 'JB Welded' (a modern high strength filled Epoxy (DONT use Araldite!)) onto the body once the plating on the body had been removed. There has to be a bit of free space at the suction end of the pump inside the cap to allow fuel circulation and vent of the pump overpressure hole. The pump is mouned on the 'sawn off' section of the original 'in tank' mount, horizontally, complete with the original fuel filter above. Connection is by high pressure 8mm bore pipe from the tank and 8mm bore pipe to the injector rail with a 6mm bore return to the tank from the regulator.

From what I have seen most of the Japanese 'in tank' pumps are very similar, certaily I recon that Honda are using a generic pump for all of their 'in tank' applications. Even the XL 128 pump i have is a slightly smaller clone of the VFR800 one!

Can confirm the flow and power consumption - my engine has only got a 90W dynastart to do everything, including ECU, Pump, Ignition and starting the engine! The Battery (18AH) has yet to go flat!and need re-charging!

regards,

John.