xs1100 carbs

[mav2]

i have an xs1100 motor mounted in my xj, on the carbs i have my 2 fuel lines coming fromeach set of 2 carbs going to the fuel pump, just abovewhere the fuel lines mount to the carbs there is another hose on each set of 2 pointing upwards it hooks to the carb just above the fuel inlet, can anyone tell me where these have to go, and what they are for?

[randy]

Fuel pump? What fuel pump? These carbs don't need no stinkin' fuel pump!

Those two upper hoses get vented to the atmosphere. Put some small filters on them to keep dust & bugs out.

[mav2]

carbs

hmmm really? cause they came with a pump, this is a 79 xs1100 motor, and it did have a pump on it, the guy i got the carbs from kept the fuel pump as a spare for his bike, so i have the fuel pump from my xj mounted there, and converted the choke to the xj style as well..

[MindWebs]

Hmm?

Hmm?

Carbed bikes do not use fuel pumps.
Fuel injected bike have fuel pumps.

But, I wonder if you are looking at the octy?

it resembles a snowmobile pump and have many of the same hook-ups.

Our "octy" is a 2.5 inch square by 1/2 inch thick, it has 4 fuel hook-ups
and 1 vacuum line hook-up(the brass one)

the "octy" is on the bike to stop fuel flow to the carburaters after the
engine is shut off, it is a vacuum controled fuel shut off valve.

as i said, it looks like a vacuum operated fuel pump from a sled.
It's Not.

Webs

[mav2]

carbs

thanks mind for clearing that up, you nailed it, that is exactly what i am talking about, nice to finally get that straight..lol and also any ideas from anyone on what to use on the lines that are vented to athmosphere forfilters?
also the stock oil pressure guage on the xs will it work with a automotive type oil pressure guage?i know i have to put the oil level sensor and oil pan from the xj motor on it, but would like to have an oil pressure guage as well

[TopCatGr58]

Hey Mav2,

The XS pressure sensor is just an On/OFF type of switch! If you look at the engine, there is an oil galley that runs off to the right from where the XS oil pressure sensor fits, you can unplug that galley plug and put your sending unit for your oil pressure gauge there. Others have actually mounted the gauge directly on that galley, no messy hoses to worry about, routing, breaking and leaking, just a quick glance down and you can see the pressure gauge!
T.C.

[mav2]

pressure switch

ok, so it will run a light but not a guage, but that ok too, i am kinda thinking about building up a multiplex system for it using class1 by eskey, i have the parts already, and can use the oil pressure switch as an input to control other functions on the bike,

[psycoreefer]

You can't just say that all carbed bikes don't use a fuel pump, many a carbed bike, honda shadows off the top of my head, use fuel pumps because the reserve tank is lower then the carbs. However our XS's don't need one because the tank is higher so gravity does the work.

[Fred]

xs carbs

g'day Mav2
I used the copper/brass filters off the fuel tap externally mounted on the bottom of the fuel tank from a Victa lawnmower. They are the perfect diameter for the vacuum lines and cost less than a dollar for a pair. I've had them on for about 140,000Km and there is no sign of deterioration. Good luck.
Ride Hard, Party Often
Fred
78 XS1100E